SEER2/HSPF2 Calculation App beta
Disclaimer
This is an beta version. Usage of this app is limited to validation purposes..
(01/04/2023) The SEER2 and HSPF2 calculations in this app are updated by reflecting changes in Appendix M1 based on Oct 25 Federal Register 2022-22257.
The tool is just for information, the regulations hold the manufacturer ultimately responsible for compliance with all published requirements, and we disclaim any liability for errors in the program.
Basic Information
The SEER, SEER2, HSPF, and HSPF2 calculation procedures are defined in Federal Regulation Title 10, Chapter II, Subchapter D, Part 430, Subpart B, Appendix M and Appendix M1, and ASHRAE 116 and AHRI 210/240 (2023). In order to provide most updated information, the calculation in this application primarily considers Appendix M and Appendix M1.
Please note that M1 SEER or M1 HSPF in this application denote SEER2 or HSPF2 defined in Appendix M1, respectively.
Justification
1. AHRI Certification provides this online app to help its members prepare for updated energy efficiency descriptors in central residential air-conditioners and heat pump performances descriptors.
2. AHRI expands its core services to Data Analytics. This application is developed for AHRI’s members so as not only to provide a energy efficiency descriptor calculator but also to provide a data-driven performance characterization tool.
Verification
The SEER2/HSPF2 calculations using Appendix M1 have gone through cross-comparisons by using results from independent testing laboratories and product literature. However, errors may exist. If you find errors in the calculation, please contact the Technical Team in AHRI.
Contact
For any errors, questions, or feedback, please contact us.
Citation
For citation and reference to this application please use the following information:
Wongyu Choi, 2022. AHRI SEER2/HSPF2 Calculation App. Air-Conditioning, Heating, and Refrigeration Institute. Arlington, VA USA.
Abbreviation / Nomenclatures
There are abbreviations and nomenclatures used in this application. Please refer to the following incomplete list.
- Appendix M / M1: Federal Regulation Title 10, Chapter II, Subchapter D, Part 430, Subpart B, Appendix M or Appendix M1\
- bin: cooling or heating bin (or bin temperature)
- coeff: coefficient\
- comp: compressor\
- COP: Coefficient of Performance, W/W (dimensionless)\
- EER: Energy Efficiency Ratio, Capacity (Btu/hr) /Power (W)\
- full: compressor full load\
- HPF: Heat Performance Factor, equal to COP * 3.412\
- HSPF: Heating Seasonal Performance Factor, Capacity (Btu/hr) /Power (W)\
- ID: indoor or indoor condition\
- inter: compressor intermediate load\
- max: compressor maximum speed\
- min: compressor minimum load or minimum speed\
- nominal: nominal condition (defined in Appendix M / M1)\
- OD: outdoor or outdoor condition\
- SEER: Seasonal Energy Efficiency Ratio\
- spd: compressor speed\
- T: temperature
References
[1] Appendix M: 10 CFR APPENDIX M TO SUBPART B OF PART 430 - UNIFORM TEST METHOD FOR MEASURING THE ENERGY CONSUMPTION OF CENTRAL AIR CONDITIONERS AND HEAT PUMPS link
[2] Appendix M1: 10 CFR APPENDIX M1 TO SUBPART B OF PART 430 - UNIFORM TEST METHOD FOR MEASURING THE ENERGY CONSUMPTION OF CENTRAL AIR CONDITIONERS AND HEAT PUMPS link
[3] Part429: CERTIFICATION, COMPLIANCE, AND ENFORCEMENT FOR CONSUMER PRODUCTS AND COMMERCIAL AND INDUSTRIAL EQUIPMENT link
[4] ASHRAE 37: Methods of Testing for Rating Electrically Driven Unitary Air-Conditioning and Heat Pump Equipment link
[5] ASHRAE 116: Methods of Testing for Rating Seasonal Efficiency of Unitary Air Conditioners and Heat Pumps link
[6] AHRI 210/240 (2017): Performance Rating of Unitary Air-Conditioning & Air-Source Heat Pump Equipment link
[7] AHRI 210/240 (2023): Performance Rating of Unitary Air-Conditioning & Air-Source Heat Pump Equipment link
[8] Energy Star: Central Air Conditioners and Air Source Heat Pumps link
Privacy Policy
This SEER2/HSPF2 Calculation App adheres to the AHRInet.org privacy policy link
SEER & SEER2 Calculation for Single-Speed Compressor with Fixed-Speed, Constant-Air-Volume-Rate, or Coil-Only Indoor System
Input Table
You can change/edit/delete/download by left-click or right-click.
For calculations, please allow some moment to repopulate results and plots.
About the Input Parameters and Calculations
HSPF/HSPF2 for Single Speed Compressor, Single Speed or Constant Volume Blower
specifically, SEER/SEER2 Calculations for a Blower Coil System Having a Single-Speed Compressor and Either a Fixed-Speed Indoor Blower or a Constant-Air-Volume-Rate Indoor Blower, or a Single-Speed Coil-Only System Air Conditioner or Heat Pump
AHRI does its best to provide the most accurate information regarding interpretation of the codes, documents, and standards. If there is any information that needs to be corrected or updated, please contact us.
Input Parameters
NOTE 1: otherwise noted, all parameters are minimal information to calculate SEER or HSPF.
NOTE 2: input inconsistency may result in errors. e.g., H4 tested: TRUE, H4-Test Capacity: missing
| Name Shown in Input Table | Name Used for Calculation | Unit | Data Requirement | Description |
|---|---|---|---|---|
| Compressor Type | compressorDesignStage | NA | Not Required | Should be single speed |
| ID Blower Type | indoorBlowerType | NA | Not Required | Should be one of the following: Fixed Speed / PSC, Fixed Speed / Constant Torque, Constant Volume Rate, Coil-only |
| Need Coil-only Adjustment | needCoilOnlyAdjust | NA | Required | The indoor unit is coil-only and the calculation needs capacity and power adjustment, Appendix M |
| Mobile home, Space Constrained | isMobileHomeAndSpaceConstrained | NA | when Need Coil-Only Adjustment is TRUE | The indoor unit is mobile-home type and space constrained. In Appendix M1, coil-only types are further divided with different adjustment coefficients |
| Non-mobile Home, Non-space Constrained | isNonmobileHomeAndNonSpaceConstrained | NA | when Need Coil-Only Adjustment is TRUE | The indoor unit is non-mobile-home type and Space Constrained. In Appendix M1, coil-only types are further divided with different adjustment coefficients |
| Degradation coeff | degCoeffCool | dimensionless | Required | Degradation Coefficient, should be between 0.00 to 0.20, rounded to the nearest 0.01. Note: AHRI requires the D-Test as one of mandatory tests in order to determine the Degradation coefficient from the test. |
| B-Test Capacity,Btu/hr | coolCapacity82 | Btu/hr | Required | NA |
| B-Test Power,W | powerConsumption82 | W | Required | NA |
| B-Test Std.Airflow, scfm | scfm82 | scfm | when Need Coil-Only Adjustment is TRUE | calculated standard airflow at B-Test |
Calculation Results
When downloaded, the results are concatenated if the variable is determined at each bin temperature. For example, ratioTotalPower1, ratioTotalPower2, ratioTotalPower3, etc.
| Result Variable Name | Unit | Description |
|---|---|---|
| capacities and powers | Btu/hr, W | Imported from the input dataset. Depending on setup types (e.g., coil-only), quantities may have been adjusted. |
| SEER | Btu/hr-W | NA |
Testing Conditions
Table 1. Testing Conditions in Appendix M
Table 2. Testing Conditions in Appendix M1
For the full detail, please download results.
SEER & SEER2 Calculation for Single-Speed Compressor
with indoor blower modulating per Outdoor Temperatures
Input Table
You can change/edit/delete/download by left-click or right-click.
For calculations, please allow some moment to repopulate results and plots.
About the Input Parameters and Calculations
SEER/SEER2 for an Air Conditioner or Heat Pump Having a Single-Speed Compressor and a Variable-Speed Variable-Air-Volume-Rate Indoor Blower
AHRI does its best to provide the most accurate information regarding interpretation of the codes, documents, and standards. If there is any information that needs to be corrected or updated, please contact us.
Input Parameters
NOTE 1: otherwise noted, all parameters are minimal information to calculate SEER or HSPF.
NOTE 2: input inconsistency may result in errors. e.g., H4 tested: TRUE, H4-Test Capacity: missing
| Name Shown in Input Table | Name Used for Calculation | Unit | Data Requirement | Description |
|---|---|---|---|---|
| Compressor Type | compressorDesignStage | NA | Not Required | Should be single speed |
| Need Coil-only Adjustment | needCoilOnlyAdjust | NA | Required | The indoor unit is coil-only and the calculation needs capacity and power adjustment, Appendix M |
| Mobile home, Space Constrained | isMobileHomeAndSpaceConstrained | NA | when Need Coil-Only Adjustment is TRUE | The indoor unit is mobile-home type and space constrained. In Appendix M1, coil-only types are further divided with different adjustment coefficients |
| Non-mobile Home, Non-space Constrained | isNonmobileHomeAndNonSpaceConstrained | NA | when Need Coil-Only Adjustment is TRUE | The indoor unit is non-mobile-home type and Space Constrained. In Appendix M1, coil-only types are further divided with different adjustment coefficients |
| ID Blower Type | indoorBlowerType | NA | Not Required | Should be one of the following: Fixed Speed / PSC, Fixed Speed / Constant Torque, Constant Volume Rate, Coil-only |
| Degradation coeff | degCoeffCool | dimensionless | Required | Degradation Coefficient, should be between 0.00 to 0.20, rounded to the nearest 0.01. AHRI requires the D-Test in order to determine the Degradation coefficient from the test. |
| A2-Test Capacity | coolCapacity95full | Btu/hr | Required | NA |
| A1-Test Capacity | coolCapacity95min | Btu/hr | Required | NA |
| B2-Test Capacity | coolCapacity82full | Btu/hr | Required | NA |
| B1-Test Capacity | coolCapacity82min | Btu/hr | Required | NA |
| A2-Test Power | powerConsumption95full | W | Required | NA |
| A1-Test Power | powerConsumption95min | W | Required | NA |
| B2-Test Power | powerConsumption82full | W | Required | NA |
| B1-Test Power | powerConsumption82min | W | Required | NA |
| FanSpeed,full | fanSpeed_full | CFM, W, rpm | Required | maximum fan speed either in CFM or Power, whichever is the primary control variable for indoor fan modlation |
| FanSpeed,min | fanSpeed_min | CFM, W, rpm | Required | minimum fan speed either in CFM or Power, whichever is the primary control variable for indoor fan modlation |
| FanSpeed,bin1,67F | fanSpeed_T1 | CFM, W, rpm | Required | if not tested exactly please use proper means of fan speed determincation such as fan laws or interpolations |
| FanSpeed,bin2,72F | fanSpeed_T2 | CFM, W, rpm | Required | same as above |
| FanSpeed,bin3,77F | fanSpeed_T3 | CFM, W, rpm | Required | same as above |
| FanSpeed,bin4,82F | fanSpeed_T4 | CFM, W, rpm | Required | same as above |
| FanSpeed,bin5,87F | fanSpeed_T5 | CFM, W, rpm | Required | same as above |
| FanSpeed,bin6,92F | fanSpeed_T6 | CFM, W, rpm | Required | same as above |
| FanSpeed,bin7,97F | fanSpeed_T7 | CFM, W, rpm | Required | same as above |
| FanSpeed,bin8,102F | fanSpeed_T8 | CFM, W, rpm | Required | same as above |
| A2-Test Std.Airflow, scfm | scfm95full | scfm | when Need Coil-Only Adjustment is TRUE | calculated standard airflow at A2-Test |
| A1-Test Std.Airflow, scfm | scfm95min | scfm | when Need Coil-Only Adjustment is TRUE | calculated standard airflow at A1-Test |
| B2-Test Std.Airflow, scfm | scfm82full | scfm | when Need Coil-Only Adjustment is TRUE | calculated standard airflow at B2-Test |
| B1-Test Std.Airflow, scfm | scfm82min | scfm | when Need Coil-Only Adjustment is TRUE | calculated standard airflow at B1-Test |
Calculation Results
When downloaded, the results are concatenated if the variable is determined at each bin temperature. For example, ratioTotalPower1, ratioTotalPower2, ratioTotalPower3, etc.
| Result Variable Name | Unit | Description |
|---|---|---|
| capacities and powers | Btu/hr, W | Imported from the input dataset. Depending on setup types (e.g., coil-only), quantities may have been adjusted. |
| binCoolCapacity_k1 | Btu/hr | Interpolated/Extrapolated heat capacity at minimum indoor fan speed, based on tested capacities over bin temperatures, Btu/hr. |
| binCoolCapacity_k2 | Btu/hr | Interpolated/Extrapolated heat capacity at maximum indoor fan speed, based on tested capacities over bin temperatures, Btu/hr. |
| binCoolCapacity | Btu/hr | Interpolated/Extrapolated capacity based on actual indoor fan speed and tested capacities over bin temperatures, Btu/hr. |
| buildingCoolLoad | Btu/hr | building cooling load, which is calculated based on test unit capacity over bin tempreratures. |
| ratioTotalCooling | W | the amount of capacity supplied to the building multiplied by fractional bin hours (nj/N) per each bin temperature, Btu/hr. |
| binPowerConsumption_k1 | W | Interpolated/Extrapolated electrical power at minimum indoor fan speed, based on tested capacities over bin temperatures, W. |
| binPowerConsumption_k2 | W | Interpolated/Extrapolated electrical power at maximum indoor fan speed, based on tested capacities over bin temperatures, W. |
| binPowerConsumption | W | Interpolated/Extrapolated electrical power based on actual indoor fan speed and tested capacities over bin temperatures, W. |
| ratioTotalPower | W | The ratio of the electrical energy consumed by the heat pump during periods of the heating season when the outdoor temperature fell within the range represented by bin temperature Tj to the total number of hours in the cooling season (N), W. |
| SEER | Btu/hr-W | NA |
Testing Conditions
Table 1. Testing Conditions in Appendix M
Table 2. Testing Conditions in Appendix M1
For the full detail, please download results.
SEER & SEER2 Calculation for Dual Stage (Two-capacity) Comprssors
Input Table
You can change/edit/delete/download by left-click or right-click.
For calculations, please allow some moment to repopulate results and plots.
About the Input Parameters and Calculations
SEER/SEER2 for an Air Conditioner or Heat Pump Having a Two-Capacity Compressor
AHRI does its best to provide the most accurate information regarding interpretation of the codes, documents, and standards. If there is any information that needs to be corrected or updated, please contact us.
Input Parameters
NOTE 1: otherwise noted, all parameters are minimal information to calculate SEER or HSPF.
NOTE 2: input inconsistency may result in errors. e.g., H4 tested: TRUE, H4-Test Capacity: missing
| Name Shown in Input Table | Name Used for Calculation | Unit | Data Requirement | Description |
|---|---|---|---|---|
| Compressor Type | compressorDesignStage | NA | Not Required | Should be Dual Stage |
| ID Blower Type | lockOutLowCapacityOps | NA | Not Required | Should be one of the following: Fixed Speed / PSC, Fixed Speed / Constant Torque, Constant Volume Rate, Coil-only |
| Need Coil-only Adjustment | needCoilOnlyAdjust | NA | Required | The indoor unit is coil-only and the calculation needs capacity and power adjustment, Appendix M |
| Mobile home, Space Constrained | isMobileHomeAndSpaceConstrained | NA | when Need Coil-Only Adjustment is TRUE | The indoor unit is mobile-home type and space constrained. In Appendix M1, coil-only types are further divided with different adjustment coefficients |
| Non-mobile Home, Non-space Constrained | isNonmobileHomeAndNonSpaceConstrained | NA | when Need Coil-Only Adjustment is TRUE | The indoor unit is non-mobile-home type and Space Constrained. In Appendix M1, coil-only types are further divided with different adjustment coefficients |
| Lock Out Low Capacity? | ODTempWhenLockOut | TRUE/FALSE | Only if available | applies to an AC with a Dual Speed Compressor that opt out low speed operation above certain temperatures |
| Lockout Temperature | indoorBlowerType | F | when 'Lock Out Low Capacity?' is TRUE | applies to an AC with a Dual Speed Compressor that opt out low speed operation above certain temperatures |
| Degradation Coeff Full | degCoeffCoolFull | dimensionless | Only if available | Degradation Coefficient for compressor k=2 (high) stage, if provided, the coefficient is compared to k=1 (low) and default value (0.20), see below for for more informaiton. |
| Degradation Coeff Min | degCoeffCoolMin | dimensionless | Required | Degradation Coefficient for compressor k=1(low) stage, should be between 0.00 to 0.20, rounded to the nearest 0.01. AHRI requires the D-Test in order to determine the Degradation coefficient from the test. |
| A2-Test Capacity | coolCapacity95full | Btu/hr | Required | NA |
| B2-Test Capacity | coolCapacity82full | Btu/hr | Required | NA |
| B1-Test Capacity | coolCapacity82min | Btu/hr | Required | NA |
| F1-Test Capacity | coolCapacity67min | Btu/hr | Required | NA |
| A2-Test Power | powerConsumption95full | W | Required | NA |
| B2-Test Power | powerConsumption82full | W | Required | NA |
| B1-Test Power | powerConsumption82min | W | Required | NA |
| F1-Test Power | powerConsumption67min | W | Required | NA |
| A2-Test Std.Airflow, scfm | scfm95full | scfm | when Need Coil-Only Adjustment is TRUE | calculated standard airflow at A2-Test |
| B2-Test Std.Airflow, scfm | scfm82full | scfm | when Need Coil-Only Adjustment is TRUE | calculated standard airflow at B2-Test |
| B1-Test Std.Airflow, scfm | scfm82min | scfm | when Need Coil-Only Adjustment is TRUE | calculated standard airflow at B1-Test |
| F1-Test Std.Airflow, scfm | scfm67min | scfm | when Need Coil-Only Adjustment is TRUE | calculated standard airflow at F1-Test |
Calculation Results
When downloaded, the results are concatenated if the variable is determined at each bin temperature. For example, ratioTotalPower1, ratioTotalPower2, ratioTotalPower3, etc.
| Result Variable Name | Unit | Description |
|---|---|---|
| capacities and powers | Btu/hr, W | Imported from the input dataset. Depending on setup types (e.g., coil-only), quantities may have been adjusted. |
| binCoolCapacity_k1 | Btu/hr | Interpolated/Extrapolated heat capacity at low compressor stage (k=1), based on tested capacities over bin temperatures, Btu/hr. |
| binCoolCapacity_k2 | Btu/hr | Interpolated/Extrapolated heat capacity at high compressor stage (k=2), based on tested capacities over bin temperatures, Btu/hr. |
| buildingCoolLoad | Btu/hr | building cooling load, which is calculated based on test unit capacity over bin tempreratures. |
| ratioTotalCooling | Btu/hr | the amount of capacity supplied to the building multiplied by fractional bin hours (nj/N) per each bin temperature, Btu/hr. |
| binPowerConsumption_k1 | W | Interpolated/Extrapolated electrical power at low compressor stage (k=1), based on tested capacities over bin temperatures, W. |
| binPowerConsumption_k2 | W | Interpolated/Extrapolated electrical power at high compressor stage (k=2), based on tested capacities over bin temperatures, W. |
| ratioTotalPower | W | The ratio of the electrical energy consumed by the heat pump during periods of the heating season when the outdoor temperature fell within the range represented by bin temperature Tj to the total number of hours in the cooling season (N), W. |
| SEER | Btu/hr-W | NA |
Testing Conditions
Table 1. Testing Conditions in Appendix M
Table 2. Testing Conditions in Appendix M1
For the full detail, please download results.
SEER & SEER2 Calculation for Variable Speed Comprssors
Input Table
You can change/edit/delete/download by left-click or right-click.
For calculations, please allow some moment to repopulate results and plots.
About the Input Parameters and Calculations
SEER/SEER2 Calculations for an Air Conditioner or Heat Pump Having a Variable-Speed Compressor
AHRI does its best to provide the most accurate information regarding interpretation of the codes, documents, and standards. If there is any information that needs to be corrected or updated, please contact us.
Input Parameters
NOTE 1: otherwise noted, all parameters are minimal information to calculate SEER or HSPF.
NOTE 2: input inconsistency may result in errors. e.g., H4 tested: TRUE, H4-Test Capacity: missing
| Name Shown in Input Table | Name Used for Calculation | Unit | Data Requirement | Description |
|---|---|---|---|---|
| Compressor Type | compressorDesignStage | NA | Not Required | Should be Variable Speed |
| ID Blower Type | indoorBlowerType | NA | Not Required | Should be one of the following: Fixed Speed / PSC, Fixed Speed / Constant Torque, Constant Volume Rate, Coil-only |
| Need Coil-only Adjustment | needCoilOnlyAdjust | NA | Required | The indoor unit is coil-only and the calculation needs capacity and power adjustment, Appendix M |
| Mobile home, Space Constrained | isMobileHomeAndSpaceConstrained | NA | when Need Coil-Only Adjustment is TRUE | The indoor unit is mobile-home type and space constrained. In Appendix M1, coil-only types are further divided with different adjustment coefficients |
| Non-mobile Home, Non-space Constrained | isNonmobileHomeAndNonSpaceConstrained | NA | when Need Coil-Only Adjustment is TRUE | The indoor unit is non-mobile-home type and Space Constrained. In Appendix M1, coil-only types are further divided with different adjustment coefficients |
| Is Variable-Speed HP | isVarHP | NA | Required | Is the unit under test a variable speed heat pump? (affects M1 cooling building load calculation.) |
| Degradation coeff | degCoeffCool | dimensionless | Required | Degradation Coefficient, should be between 0.00 to 0.25, rounded to the nearest 0.01. AHRI requires the D-Test in order to determine the Degradation coefficient from the test. |
| A2-Test Capacity | coolCapacity95full | Btu/hr | Required | NA |
| B2-Test Capacity | coolCapacity82full | Btu/hr | Required | NA |
| Ev-Test Capacity | coolCapacity87inter | Btu/hr | Required | NA |
| B1-Test Capacity | coolCapacity82min | Btu/hr | Required | NA |
| F1-Test Capacity | coolCapacity67min | Btu/hr | Required | NA |
| A2-Test Power | powerConsumption95full | W | Required | NA |
| B2-Test Power | powerConsumption82full | W | Required | NA |
| Ev-Test Power | powerConsumption87inter | W | Required | NA |
| B1-Test Power | powerConsumption82min | W | Required | NA |
| F1-Test Power | powerConsumption67min | W | Required | NA |
| A2-Test Std.Airflow, scfm | scfm95full | scfm | when Need Coil-Only Adjustment is TRUE | calculated standard airflow at A2-Test |
| B2-Test Std.Airflow, scfm | scfm82full | scfm | when Need Coil-Only Adjustment is TRUE | calculated standard airflow at B2-Test |
| Ev-Test Std.Airflow, scfm | scfm87inter | scfm | when Need Coil-Only Adjustment is TRUE | calculated standard airflow at Ev-Test |
| B1-Test Std.Airflow, scfm | scfm82min | scfm | when Need Coil-Only Adjustment is TRUE | calculated standard airflow at B1-Test |
| F1-Test Std.Airflow, scfm | scfm67min | scfm | when Need Coil-Only Adjustment is TRUE | calculated standard airflow at F1-Test |
Calculation Results
When downloaded, the results are concatenated if the variable is determined at each bin temperature. For example, ratioTotalPower1, ratioTotalPower2, ratioTotalPower3, etc.
| Result Variable Name | Unit | Description |
|---|---|---|
| capacities and powers | Btu/hr, W | Imported from the input dataset. Depending on setup types (e.g., coil-only), quantities may have been adjusted. |
| binCoolCapacity_k1 | Btu/hr | Interpolated/Extrapolated heat capacity at minimum compressor speed (k=1), based on tested capacities over bin temperatures, Btu/hr. |
| binCoolCapacity_k2 | Btu/hr | Interpolated/Extrapolated heat capacity at maximum compressor speed (k=2), based on tested capacities over bin temperatures, Btu/hr. |
| buildingCoolLoad | Btu/hr | building cooling load, which is calculated based on test unit capacity over bin tempreratures. |
| binCoolCapacity_k2_87 | Btu/hr | Interpolated/Extrapolated heat capacity at 87 degF outdoor with minimum compressor speed (k=1), based on tested capacities over bin temperatures, Btu/hr. |
| binCoolCapacity_k1_87 | Btu/hr | Interpolated/Extrapolated heat capacity at 87 degF outdoor with maximum compressor speed (k=2), based on tested capacities over bin temperatures, Btu/hr. |
| N_Q | dimensionless | Capacity Slope or Ratio between minimum compressor speed and intermediate compressor speed |
| M_Q | dimensionless | Finding Centroid of the variable speed operation based by incorporating k=1 (minimum), k=2 (maximum), and k=i (intermediate) compressor speed capacities |
| binCoolCapacityInter | Btu/hr | Interpolated/Extrapolated capacity at intermediate compressor speed, based on tested capacities over bin temperatures, Btu/hr. |
| ratioTotalCooling | Btu/hr | the amount of capacity supplied to the building multiplied by fractional bin hours (nj/N) per each bin temperature, Btu/hr. |
| binPowerConsumption_k1 | W | Interpolated/Extrapolated electrical power at minimum compressor speed (k=1), based on tested capacities over bin temperatures, W. |
| binPowerConsumption_k2 | W | Interpolated/Extrapolated electrical power at maximum compressor speed (k=2), based on tested capacities over bin temperatures, W. |
| binPowerConsumption_k1_87 | W | Interpolated/Extrapolated electrical power at 87 degF outdoor with minimum compressor speed (k=1), based on tested capacities over bin temperatures, W. |
| binPowerConsumption_k2_87 | W | Interpolated/Extrapolated electrical power at 87 degF outdoor with maximum compressor speed (k=2), based on tested capacities over bin temperatures, W. |
| N_E | dimensionless | Power Slope or Ratio between minimum compressor speed and intermediate compressor speed |
| M_E | dimensionless | Finding Centroid of the variable speed operation based by incorporating k=1 (minimum), k=2 (maximum), and k=i (intermediate) compressor speed power consumptions |
| binPowerConsumptionInter | W | Interpolated/Extrapolated capacity at intermediate compressor speed, based on tested capacities over bin temperatures, Btu/hr. |
| T_1 | F | the outdoor temperature at which the unit, when operating at minimum compressor speed, provides a space cooling capacity that is equal to the building load |
| T_v | F | the outdoor temperature at which the unit, when operating at the intermediate compressor speed used during the section 3.2.4 Ev-test of this appendix, provides a space cooling capacity that is equal to the building load |
| T_2 | F | the outdoor temperature at which the unit,EER2k=2(Tj) is the steady-state energy efficiency ratio of the test unit when operating at full compressor speed, provides a space cooling and temperature Tj, Btu/h per W, calculated using capacity that is equal to the building load |
| EER_k1_T1 | Btu/hr-W | EER at the temperature T_1 by using binCoolCapacity and binPower at k=1 |
| EER_kv_Tv | Btu/hr-W | EER at the temperature T_v by using binCoolCapacity and binPower at k=v |
| EER_k2_T2 | Btu/hr-W | EER at the temperature T_2 by using binCoolCapacity and binPower at k=2 |
| ratioTotalPower | W | The ratio of the electrical energy consumed by the heat pump during periods of the heating season when the outdoor temperature fell within the range represented by bin temperature Tj to the total number of hours in the cooling season (N), W. |
| SEER | Btu/hr-W | NA |
Testing Conditions
Table 1. Testing Conditions in Appendix M
Table 2. Testing Conditions in Appendix M1
For the full detail, please download results.
SEER & SEER2 Calculation for Indoor Multi Blower Setup
under development :)
HSPF & HSPF2 Calculation for Single-Speed Compressor
with Fixed-Speed, Constant-Air-Volume-Rate, or Coil-Only Indoor System
Input Table
You can change/edit/delete/download by left-click or right-click.
For calculations, please allow some moment to repopulate results and plots.
About the Input Parameters and Calculations
HSPF/HSPF2 for Single Speed Compressor, Single Speed or Constant Volume Blower
Specifically, HSPF/HSPF2 for a Blower Coil System Heat Pump Having a Single-Speed Compressor and Either a Fixed-Speed Indoor Blower or a Constant-Air-Volume-Rate Indoor Blower, or a Single-Speed Coil-Only System Heat Pump
AHRI does its best to provide the most accurate information regarding interpretation of the codes, documents, and standards. If there is any information that needs to be corrected or updated, please contact us.
Input Parameters
NOTE 1: otherwise noted, all parameters are minimal information to calculate SEER or HSPF.
NOTE 2: input inconsistency may result in errors. e.g., H4 tested: TRUE, H4-Test Capacity: missing
| Name Shown in Input Table | Name Used for Calculation | Unit | Data Requirement | Description |
|---|---|---|---|---|
| Compressor Type | compressorDesignStage | NA | Not Required | Should be single speed |
| ID Blower Type | indoorBlowerType | NA | Not Required | Constant Torque, Constant Volume Rate, Coil-only |
| Need Coil-only Adjustment | needCoilOnlyAdjust | NA | Required | The indoor unit is coil-only and the calculation needs capacity and power adjustment, Appendix M |
| Mobile home, Space Constrained | isMobileHomeAndSpaceConstrained | NA | when Need Coil-Only Adjustment is TRUE | The indoor unit is mobile-home type and space constrained. In Appendix M1, coil-only types are further divided with different adjustment coefficients |
| Non-mobile Home, Non-space Constrained | isNonmobileHomeAndNonSpaceConstrained | NA | when Need Coil-Only Adjustment is TRUE | The indoor unit is non-mobile-home type and Space Constrained. In Appendix M1, coil-only types are further divided with different adjustment coefficients |
| H4 Tested | H4Tested | TRUE/FALSE | Only if available | Is an optional H4 test tested? |
| Shut Off Temperature | T_off | F | Only if available | the outdoor temperature when the compressor is automatically shut off (If no such temperature exists, Tj is always greater than Toff and Ton). |
| Turn On Tempearture | T_on | F | Only if available | the outdoor temperature when the compressor is automatically turned back on, if applicable, following an automatic shut-off |
| Demand Defrost Credit | demandDefrostCredit | F | Required | defined in 3.9.2 in Appendix M and M1 |
| Degradation coeff | degCoeffHeat | dimensionless | Required | should be between 0.00 to 0.25, rounded to the nearest 0.01. |
| A-Test Capacity | coolCapacity95Full | Btu/h | Required | Appendix M1 uses A-Test for Heating Load calculation while M1 uses H1-Test Capacity. For heating-only HP, provide H1 instead. |
| H1-Test Capacity | heatCapacity47 | Btu/h | Required | NA |
| H2-Test Capacity | heatCapacity35 | Btu/h | Required | NA |
| H3-Test Capacity | heatCapacity17 | Btu/h | Required | NA |
| (opt)H4-Test Capacity | heatCapacity5 | Btu/h | when H4 Tested is TRUE | Optional field, should be provided when H4 Tested was checked (TRUE) |
| H1-Test Power | powerConsumption47 | W | Required | NA |
| H2-Test Power | powerConsumption35 | W | Required | NA |
| H2-Test Power | powerConsumption17 | W | Required | NA |
| (opt)H4-Test Power | powerConsumption5 | W | when H4 Tested is TRUE | Optional field, should be provided when H4 Tested was checked (TRUE) |
| A/H1-Test Std.Airflow, scfm | scfm95full | scfm | when Need Coil-Only Adjustment is TRUE | calculated standard airflow at A-Test or H1 (for heating only HP) Test |
| H1-Test Std.Airflow, scfm | scfm47 | scfm | when Need Coil-Only Adjustment is TRUE | calculated standard airflow at H1-Test |
| H2-Test Std.Airflow, scfm | scfm35 | scfm | when Need Coil-Only Adjustment is TRUE | calculated standard airflow at H2-Test |
| H3-Test Std.Airflow, scfm | scfm17 | scfm | when Need Coil-Only Adjustment is TRUE | calculated standard airflow at H3-Test |
| (opt)H4-Test Std.Airflow, scfm | scfm5 | scfm | when Need Coil-Only Adjustment and H4 Tested are TRUE | calculated standard airflow at H12-Test |
Calculation Results
When downloaded, the results are concatenated if the variable is determined at each bin temperature. For example, ratioTotalPower1, ratioTotalPower2, ratioTotalPower3, etc.
| Result Variable Name | Unit | Description |
|---|---|---|
| capacities and powers | Btu/hr, W | Imported from the input dataset. Depending on setup types (e.g., coil-only), quantities may have been adjusted. |
| DHR | Btu/hr | Design Heating Requirements, DHR predicts the space heating load of a residence when subjected to outdoor design conditions. Estimates for the minimum and maximum DHR are provided for six generalized U.S. climatic regions in section 4.2 of this appendix M. Only used in Appendix M. |
| buildingHeatLoad | Btu/hr | building heating load, which is calculated based on test unit capacity over bin tempreratures. |
| binHeatCapacity | Btu/hr | Interpolated/Extrapolated heat capacity based on tested capacities over bin temperatures, Btu/hr. |
| binPowerConsumption | W | Interpolated/Extrapolated electrical power based on tested capacities over bin temperatures, W. |
| cutOut_delta | dimensionless | cut out factor is a value among 0, ½, and 1 that indicates the heat pump compressor is operating with certain stages or single speed at certain bin temperatures. |
| ratioTotalHeating | Btu/hr | the amount of heat capacity supplied to the building multiplied by fractional bin hours (nj/N) per each bin temperature, Btu/hr. |
| ratioTotalResistHeating | W | The ratio of the electrical energy used for resistive space heating during periods when the outdoor temperature fell within the range represented by bin temperature Tj to the total number of hours in the heating season (N), W. |
| ratioTotalPower | W | The ratio of the electrical energy consumed by the heat pump during periods of the heating season when the outdoor temperature fell within the range represented by bin temperature Tj to the total number of hours in the heating season (N), W. |
| HSPF | Btu/hr-W | NA |
Testing Conditions
Table 1. Testing Conditions in Appendix M
Table 2. Testing Conditions in Appendix M1
For the full detail, please download results.
HSPF & HSPF2 Calculation for Single-Speed Compressor
with indoor blower modulating per Outdoor Temperatures
Input Table
You can change/edit/delete/download by left-click or right-click.
For calculations, please allow some moment to repopulate results and plots.
About the Input Parameters and Calculations
HSPF/HSPF2 of a Heat Pump Having a Single-Speed Compressor and a Variable-Speed, Variable-Air-Volume-Rate Indoor Blower
AHRI does its best to provide the most accurate information regarding interpretation of the codes, documents, and standards. If there is any information that needs to be corrected or updated, please contact us.
Input Parameters
NOTE 1: otherwise noted, all parameters are minimal information to calculate SEER or HSPF.
NOTE 2: input inconsistency may result in errors. e.g., H4 tested: TRUE, H4-Test Capacity: missing
| Name Shown in Input Table | Name Used for Calculation | Unit | Data Requirement | Description |
|---|---|---|---|---|
| Compressor Type | compressorDesignStage | NA | Not Required | Should be single speed |
| ID Blower Type | indoorBlowerType | NA | Not Required | Should be Variable Speed / Modulation |
| Need Coil-only Adjustment | needCoilOnlyAdjust | NA | Required | The indoor unit is coil-only and the calculation needs capacity and power adjustment, Appendix M |
| Mobile home, Space Constrained | isMobileHomeAndSpaceConstrained | NA | when Need Coil-Only Adjustment is TRUE | The indoor unit is mobile-home type and space constrained. In Appendix M1, coil-only types are further divided with different adjustment coefficients |
| Non-mobile Home, Non-space Constrained | isNonmobileHomeAndNonSpaceConstrained | NA | when Need Coil-Only Adjustment is TRUE | The indoor unit is non-mobile-home type and Space Constrained. In Appendix M1, coil-only types are further divided with different adjustment coefficients |
| H4 Tested | H4Tested | TRUE/FALSE | Only if available | Is an optional H4 test tested? If TRUE (checked), you must provide H4-Test capacity and power |
| H21 Tested | H21Tested | TRUE/FALSE | Only if available | Is an optional H21 test tested? If TRUE (checked), you must provide H21-Test capacity and power |
| Shut Off Temperature | T_off | F | Only if available | the outdoor temperature when the compressor is automatically shut off (If no such temperature exists, Tj is always greater than Toff and Ton). |
| Turn On Tempearture | T_on | F | Only if available | the outdoor temperature when the compressor is automatically turned back on, if applicable, following an automatic shut-off |
| Demand Defrost Credit | demandDefrostCredit | dimensionless | Required | defined in 3.9.2 in Appendix M and M1, values typically near above 1.0 |
| Degradation coeff | degCoeffHeat | dimensionless | Required | should be between 0.00 to 0.25, rounded to the nearest 0.01. |
| A-Test Capacity | coolCapacity95Full | Btu/hr | Required | Appendix M1 uses A-Test for Heating Load calculation while M1 uses H1-Test Capacity. For heating-only HP, provide H12 instead. |
| H12-Test Capacity | heatCapacity47full | Btu/hr | Required | NA |
| H11-Test Capacity | heatCapacity47min | Btu/hr | Required | NA |
| H22-Test Capacity | heatCapacity35full | Btu/hr | Required | NA |
| (opt)H21-Test Capacity | heatCapacity35min | Btu/hr | when H21 Tested is TRUE | Optional field, should be provided when H21 Tested was checked (TRUE) |
| H32-Test Capacity | heatCapacity17full | Btu/hr | Required | NA |
| H31-Test Capacity | heatCapacity17min | Btu/hr | Required | NA |
| (opt)H4-Test Capacity | heatCapacity5full | Btu/hr | when H4 Tested is TRUE | Optional field, should be provided when H4 Tested was checked (TRUE) |
| H12-Test Power | powerConsumption47full | W | Required | NA |
| H11-Test Power | powerConsumption47min | W | Required | NA |
| H22-Test Power | powerConsumption35full | W | Required | NA |
| (opt)H21-Test Power | powerConsumption35min | W | when H21 Tested is TRUE | Optional field, should be provided when H21 Tested was checked (TRUE) |
| H32-Test Power | powerConsumption17full | W | Required | NA |
| H31-Test Power | powerConsumption17min | W | Required | NA |
| (opt)H4-Test Power | powerConsumption5full | W | when H4 Tested is TRUE | Optional field, should be provided when H4 Tested was checked (TRUE) |
| FanSpeed,full | fanSpeed_full | CFM, W, rpm | Required | maximum fan speed either in CFM or Power, whichever is the primary control variable for indoor fan modlation |
| FanSpeed,min | fanSpeed_min | CFM, W, rpm | Required | minimum fan speed either in CFM or Power, whichever is the primary control variable for indoor fan modlation |
| FanSpeed,bin1,62F | fanSpeed_T1 | CFM, W, rpm | Required | if not tested exactly please use proper means of fan speed determincation such as fan laws or interpolations |
| FanSpeed,bin2,57F | fanSpeed_T2 | CFM, W, rpm | Required | same as above |
| FanSpeed,bin3,52F | fanSpeed_T3 | CFM, W, rpm | Required | same as above |
| FanSpeed,bin4,47F | fanSpeed_T4 | CFM, W, rpm | Required | same as above |
| FanSpeed,bin5,42F | fanSpeed_T5 | CFM, W, rpm | Required | same as above |
| FanSpeed,bin6,37F | fanSpeed_T6 | CFM, W, rpm | Required | same as above |
| FanSpeed,bin7,32F | fanSpeed_T7 | CFM, W, rpm | Required | same as above |
| FanSpeed,bin8,27F | fanSpeed_T8 | CFM, W, rpm | Required | same as above |
| FanSpeed,bin9,22F | fanSpeed_T9 | CFM, W, rpm | Required | same as above |
| FanSpeed,bin10,17F | fanSpeed_T10 | CFM, W, rpm | Required | same as above |
| FanSpeed,bin11,12F | fanSpeed_T11 | CFM, W, rpm | Required | same as above |
| FanSpeed,bin12,7F | fanSpeed_T12 | CFM, W, rpm | Required | same as above |
| FanSpeed,bin13,2F | fanSpeed_T13 | CFM, W, rpm | Required | same as above |
| FanSpeed,bin14,-3F | fanSpeed_T14 | CFM, W, rpm | Required | same as above |
| FanSpeed,bin15,-8F | fanSpeed_T15 | CFM, W, rpm | Required | same as above |
| FanSpeed,bin16,-13F | fanSpeed_T16 | CFM, W, rpm | Required | same as above |
| FanSpeed,bin17,-18F | fanSpeed_T17 | CFM, W, rpm | Required | same as above |
| FanSpeed,bin18,-23F | fanSpeed_T18 | CFM, W, rpm | Required | same as above |
| A/H12-Test Std.Airflow, scfm | scfm95full | scfm | when Need Coil-Only Adjustment is TRUE | calculated standard airflow at A2-Test or H12 (for heating only HP) Test |
| H12-Test Std.Airflow, scfm | scfm47full | scfm | when Need Coil-Only Adjustment is TRUE | calculated standard airflow at H12-Test |
| H11-Test Std.Airflow, scfm | scfm47min | scfm | when Need Coil-Only Adjustment is TRUE | calculated standard airflow at H11-Test |
| H22-Test Std.Airflow, scfm | scfm35full | scfm | when Need Coil-Only Adjustment is TRUE | calculated standard airflow at H22-Test |
| (opt)H21-Test Std.Airflow, scfm | scfm35min | scfm | when Need Coil-Only Adjustment and H21 Tested are TRUE | calculated standard airflow at H21-Test |
| H32-Test Std.Airflow, scfm | scfm17full | scfm | when Need Coil-Only Adjustment is TRUE | calculated standard airflow at H32-Test |
| H31-Test Std.Airflow, scfm | scfm17min | scfm | when Need Coil-Only Adjustment is TRUE | calculated standard airflow at H31-Test |
| (opt)H4-Test Std.Airflow, scfm | scfm5full | scfm | when Need Coil-Only Adjustment and H4 Tested are TRUE | calculated standard airflow at H4-Test |
Calculation Results
When downloaded, the results are concatenated if the variable is determined at each bin temperature. For example, ratioTotalPower1, ratioTotalPower2, ratioTotalPower3, etc.
| Result Variable Name | Unit | Description |
|---|---|---|
| capacities and powers | Btu/hr, W | Imported from the input dataset. Depending on setup types (e.g., coil-only), quantities may have been adjusted. |
| DHR | Btu/hr | Design Heating Requirements, DHR predicts the space heating load of a residence when subjected to outdoor design conditions. Estimates for the minimum and maximum DHR are provided for six generalized U.S. climatic regions in section 4.2 of this appendix M. Only used in Appendix M. |
| buildingHeatLoad | Btu/hr | building heating load, which is calculated based on test unit capacity over bin tempreratures. |
| binHeatCapacity_k1 | Btu/hr | Interpolated/Extrapolated heat capacity at minimum indoor fan speed, based on tested capacities over bin temperatures, Btu/hr. |
| binHeatCapacity_k2 | Btu/hr | Interpolated/Extrapolated heat capacity at maximum indoor fan speed, based on tested capacities over bin temperatures, Btu/hr. |
| binPowerConsumption_k1 | W | Interpolated/Extrapolated electrical power at minimum indoor fan speed, based on tested capacities over bin temperatures, W. |
| binPowerConsumption_k2 | W | Interpolated/Extrapolated electrical power at maximum indoor fan speed, based on tested capacities over bin temperatures, W. |
| binHeatCapacity | Btu/hr | Interpolated/Extrapolated heat capacity based on actual indoor fan speed and tested capacities over bin temperatures, Btu/hr. |
| binPowerConsumption | W | Interpolated/Extrapolated electrical power based on actual indoor fan speed and tested capacities over bin temperatures, W. |
| cutOut_delta | dimensionless | cut out factor is a value among 0, ½, and 1 that indicates the heat pump compressor is operating with certain stages or single speed at certain bin temperatures. |
| ratioTotalHeating | Btu/hr | the amount of heat capacity supplied to the building multiplied by fractional bin hours (nj/N) per each bin temperature, Btu/hr. |
| ratioTotalResistHeating | W | The ratio of the electrical energy used for resistive space heating during periods when the outdoor temperature fell within the range represented by bin temperature Tj to the total number of hours in the heating season (N), W. |
| ratioTotalPower | W | The ratio of the electrical energy consumed by the heat pump during periods of the heating season when the outdoor temperature fell within the range represented by bin temperature Tj to the total number of hours in the heating season (N), W. |
| HSPF | Btu/hr-W | NA |
Testing Conditions
Table 1. Testing Conditions in Appendix M
Table 2. Testing Conditions in Appendix M1
For the full detail, please download results.
HSPF & HSPF2 Calculation for Dual-Stage Compressor
Input Table
You can change/edit/delete/download by left-click or right-click.
For calculations, please allow some moment to repopulate results and plots.
About the Input Parameters and Calculations
HSPF/HSPF2 of a Heat Pump Having a Two-Capacity Compressor, Variable-Air-Volume-Rate Indoor Blower
AHRI does its best to provide the most accurate information regarding interpretation of the codes, documents, and standards. If there is any information that needs to be corrected or updated, please contact us.
Input Parameters
NOTE 1: otherwise noted, all parameters are minimal information to calculate SEER or HSPF.
NOTE 2: input inconsistency may result in errors. e.g., H4 tested: TRUE, H4-Test Capacity: missing
| Name Shown in Input Table | Name Used for Calculation | Unit | Data Requirement | Description |
|---|---|---|---|---|
| Compressor Type | compressorDesignStage | NA | Not Required | Should be Dual Stage |
| ID Blower Type | indoorBlowerType | NA | Not Required | Should be one of the following: Fixed Speed / PSC, Fixed Speed / Constant Torque, Constant Volume Rate, Coil-only |
| Need Coil-only Adjustment | needCoilOnlyAdjust | NA | Required | The indoor unit is coil-only and the calculation needs capacity and power adjustment, Appendix M |
| Mobile home, Space Constrained | isMobileHomeAndSpaceConstrained | NA | when Need Coil-Only Adjustment is TRUE | The indoor unit is mobile-home type and space constrained. In Appendix M1, coil-only types are further divided with different adjustment coefficients |
| Non-mobile Home, Non-space Constrained | isNonmobileHomeAndNonSpaceConstrained | NA | when Need Coil-Only Adjustment is TRUE | The indoor unit is non-mobile-home type and Space Constrained. In Appendix M1, coil-only types are further divided with different adjustment coefficients |
| Lock Out Low Capacity? | lockOutLowCapacityOps | TRUE/FALSE | Only if available | applies to an HP with a Dual Speed Compressor that opt out low speed operation below certain temperatures |
| Lockout Temperature | ODTempWhenLockOut | F | when 'Lock Out Low Capacity?' is TRUE | applies to an HP with a Dual Speed Compressor that opt out low speed operation below certain temperatures |
| H4 Tested | H4Tested | TRUE/FALSE | Only if available | Is an optional H4 test tested? If TRUE (checked), you must provide H4-Test capacity and power |
| H21 Tested | H21Tested | TRUE/FALSE | Only if available | Is an optional H21 test tested? If TRUE (checked), you must provide H21-Test capacity and power |
| Shut Off Temperature | T_off | F | Only if available | the outdoor temperature when the compressor is automatically shut off (If no such temperature exists, Tj is always greater than Toff and Ton). |
| Turn On Tempearture | T_on | F | Only if available | the outdoor temperature when the compressor is automatically turned back on, if applicable, following an automatic shut-off |
| Demand Defrost Credit | demandDefrostCredit | dimensionless | Required | defined in 3.9.2 in Appendix M and M1, values typically near above 1.0 |
| Degradation Coeff Full | degCoeffHeatFull | dimensionless | Required | should be between 0.00 to 0.25, rounded to the nearest 0.01. |
| Degradation Coeff Min | degCoeffHeatMin | dimensionless | Required | should be between 0.00 to 0.25, rounded to the nearest 0.01. |
| A2-Test Capacity | coolCapacity95Full | Btu/hr | Required | Appendix M1 uses A-Test for Heating Load calculation while M1 uses H1-Test Capacity. For heating-only HP, provide H12 instead. |
| H01-Test Capacity | heatCapacity62min | Btu/hr | Required | NA |
| H12-Test Capacity | heatCapacity47full | Btu/hr | Required | NA |
| H11-Test Capacity | heatCapacity47min | Btu/hr | Required | NA |
| H22-Test Capacity | heatCapacity35full | Btu/hr | Required | NA |
| (opt)H21-Test Capacity | heatCapacity35min | Btu/hr | when H21 Tested is TRUE | Optional field, should be provided when H21 Tested was checked (TRUE) |
| H32-Test Capacity | heatCapacity17full | Btu/hr | Required | NA |
| H31-Test Capacity | heatCapacity17min | Btu/hr | Required | NA |
| (opt)H4-Test Capacity | heatCapacity5full | Btu/hr | when H4 Tested is TRUE | Optional field, should be provided when H4 Tested was checked (TRUE) |
| H01-Test Power | powerConsumption62min | W | Required | NA |
| H12-Test Power | powerConsumption47full | W | Required | NA |
| H11-Test Power | powerConsumption47min | W | Required | NA |
| H22-Test Power | powerConsumption35full | W | Required | NA |
| (opt)H21-Test Power | powerConsumption35min | W | when H21 Tested is TRUE | Optional field, should be provided when H21 Tested was checked (TRUE) |
| H32-Test Power | powerConsumption17full | W | Required | NA |
| H31-Test Power | powerConsumption17min | W | Required | NA |
| (opt)H4-Test Power | powerConsumption5ful | W | when H4 Tested is TRUE | Optional field, should be provided when H4 Tested was checked (TRUE) |
| A2-Test Std.Airflow, scfm | scfm95full | scfm | when Need Coil-Only Adjustment is TRUE | calculated standard airflow at A2-Test or H12 (for heating only HP) Test |
| H01-Test Std.Airflow, scfm | scfm62min | scfm | when Need Coil-Only Adjustment is TRUE | calculated standard airflow at H01-Test |
| H12-Test Std.Airflow, scfm | scfm47full | scfm | when Need Coil-Only Adjustment is TRUE | calculated standard airflow at H12-Test |
| H11-Test Std.Airflow, scfm | scfm47min | scfm | when Need Coil-Only Adjustment is TRUE | calculated standard airflow at H11-Test |
| H22-Test Std.Airflow, scfm | scfm35full | scfm | when Need Coil-Only Adjustment is TRUE | calculated standard airflow at H22-Test |
| (opt)H21-Test Std.Airflow, scfm | scfm35min | scfm | when Need Coil-Only Adjustment and H21 Tested are TRUE | calculated standard airflow at H21-Test |
| H32-Test Std.Airflow, scfm | scfm17full | scfm | when Need Coil-Only Adjustment is TRUE | calculated standard airflow at H32-Test |
| H31-Test Std.Airflow, scfm | scfm17min | scfm | when Need Coil-Only Adjustment is TRUE | calculated standard airflow at H31-Test |
| (opt)H4-Test Std.Airflow, scfm | scfm5full | scfm | when Need Coil-Only Adjustment and H4 Tested are TRUE | calculated standard airflow at H4-Test |
Calculation Results
When downloaded, the results are concatenated if the variable is determined at each bin temperature. For example, ratioTotalPower1, ratioTotalPower2, ratioTotalPower3, etc.
| Result Variable Name | Unit | Description |
|---|---|---|
| capacities and powers | Btu/hr, W | Imported from the input dataset. Depending on setup types (e.g., coil-only), quantities may have been adjusted. |
| DHR | Btu/hr | Design Heating Requirements, DHR predicts the space heating load of a residence when subjected to outdoor design conditions. Estimates for the minimum and maximum DHR are provided for six generalized U.S. climatic regions in section 4.2 of this appendix M. Only used in Appendix M. |
| buildingHeatLoad | Btu/hr | building heating load, which is calculated based on test unit capacity over bin tempreratures. |
| binHeatCapacity_k1 | Btu/hr | Interpolated/Extrapolated heat capacity at low compressor stage (k=1), based on tested capacities over bin temperatures, Btu/hr. |
| binHeatCapacity_k2 | Btu/hr | Interpolated/Extrapolated heat capacity at high compressor stage (k=2), based on tested capacities over bin temperatures, Btu/hr. |
| binPowerConsumption_k1 | W | Interpolated/Extrapolated electrical power at low compressor stage (k=1), based on tested capacities over bin temperatures, W. |
| binPowerConsumption_k2 | W | Interpolated/Extrapolated electrical power at high compressor stage (k=2), based on tested capacities over bin temperatures, W. |
| cutOut_delta | dimensionless | cut out factor is a value among 0, ½, and 1 that indicates the heat pump compressor is operating with certain stages or single speed at certain bin temperatures. |
| cutOut_delta_prime | dimensionless | cut out factor prime defined in M/M1 Section 4.2.3.4 is used at bin temperatures with the high compressor-speed-only operation |
| ratioTotalHeating | Btu/hr | the amount of heat capacity supplied to the building multiplied by fractional bin hours (nj/N) per each bin temperature, Btu/hr. |
| ratioTotalResistHeating | W | The ratio of the electrical energy used for resistive space heating during periods when the outdoor temperature fell within the range represented by bin temperature Tj to the total number of hours in the heating season (N), W. |
| ratioTotalPower | W | The ratio of the electrical energy consumed by the heat pump during periods of the heating season when the outdoor temperature fell within the range represented by bin temperature Tj to the total number of hours in the heating season (N), W. |
| HSPF | Btu/hr-W | NA |
Testing Conditions
Table 1. Testing Conditions in Appendix M
Table 2. Testing Conditions in Appendix M1
For the full detail, please download results.
HSPF & HSPF2 Calculation for Variable Speed Compressor
Input Table
You can change/edit/delete/download by left-click or right-click.
For calculations, please allow some moment to repopulate results and plots.
About the Input Parameters and Calculations
HSPF/HSPF2 of a Heat Pump Having a Variable-Speed Compressor
AHRI does its best to provide the most accurate information regarding interpretation of the codes, documents, and standards. If there is any information that needs to be corrected or updated, please contact us.
Input Parameters
NOTE: otherwise noted, all parameters are minimal information to calculation SEER or HSPF.
NOTE: non-mandatory field does not affect calculations.
NOTE: input inconsistency may occur if full information is not provided.
e.g., H4 tested: TRUE, H4-Test Capacity: missing
| Name Shown in Input Table | Name Used for Calculation | Unit | Data Requirement | Description |
|---|---|---|---|---|
| Compressor Type | compressorDesignStage | NA | Not Required | Should be Variable Speed |
| ID Blower Type | indoorBlowerType | NA | Not Required | Should be one of the following: Fixed Speed / PSC, Fixed Speed / Constant Torque, Constant Volume Rate, Coil-only |
| Need Coil-only Adjustment | needCoilOnlyAdjust | NA | Required | The indoor unit is coil-only and the calculation needs capacity and power adjustment, Appendix M |
| Mobile home, Space Constrained | isMobileHomeAndSpaceConstrained | NA | when Need Coil-Only Adjustment is TRUE | The indoor unit is mobile-home type and space constrained. In Appendix M1, coil-only types are further divided with different adjustment coefficients |
| Non-mobile Home, Non-space Constrained | isNonmobileHomeAndNonSpaceConstrained | NA | when Need Coil-Only Adjustment is TRUE | The indoor unit is non-mobile-home type and Space Constrained. In Appendix M1, coil-only types are further divided with different adjustment coefficients |
| Is Split Unit | isSplit | TRUE/FALSE | Required | NA |
| Does Comp Limit Min-Spd | minSpeedLimiting | TRUE/FALSE | Only if available | Appendix M1 notices the variable speed control that limits minimum speed at lower outdoor temperatures. |
| H12 Tested | H12Tested | TRUE/FALSE | Only if available | NA |
| H22 Tested | H22Tested | TRUE/FALSE | Only if available | NA |
| H42 Tested | H42Tested | TRUE/FALSE | Only if available | NA |
| H1N Comp Spd = H32 Comp Spd | H1NspeedMax17 | TRUE/FALSE | Only if available | Appendix M and M1 both compare nominal compressor speeds at H1N test to low tempreature high compressor speeds at H32 test. Please refer to the testing flow charts below. |
| Shut Off Temperature | T_off | F | Only if available | NA |
| Turn On Tempearture | T_on | F | Only if available | NA |
| Demand Defrost Credit | demandDefrostCredit | dimensionless | Required | NA |
| Degradation Coeff | degCoeffHeat | dimensionless | Required | NA |
| A2-Test Capacity | coolCapacity95Full | Btu/hr | Required | Appendix M1 uses A-Test for Heating Load calculation while M1 uses H1-Test Capacity. For heating-only HP, provide H1N or H12 instead. Note: DOE does not specify which test among H1N and H12 to be used for heating only HPs. |
| H01-Test Capacity | heatCapacity62min | Btu/hr | Required | NA |
| (opt)H12-Test Capacity | heatCapacity47full | Btu/hr | when H12 Tested is TRUE | NA |
| H11-Test Capacity | heatCapacity47min | Btu/hr | Required | NA |
| H1N-Test Capacity | heatCapacity47nominal | Btu/hr | Required | NA |
| (opt)H22-Test Capacity | heatCapacity35full | Btu/hr | when H22 Tested is TRUE | NA |
| H2v-Test Capacity | heatCapacity35inter | Btu/hr | Required | NA |
| H32-Test Capacity | heatCapacity17full | Btu/hr | Required | NA |
| (opt)H4-Test Capacity | heatCapacity5full | Btu/hr | when H42 Tested is TRUE | NA |
| H01-Test Power | powerConsumption62min | W | Required | NA |
| (opt)H12-Test Power | powerConsumption47full | W | when H12 Tested is TRUE | NA |
| H11-Test Power | powerConsumption47min | W | Required | NA |
| H1N-Test Power | powerConsumption47nominal | W | Required | NA |
| (opt)H22-Test Power | powerConsumption35full | W | when H22 Tested is TRUE | NA |
| H2v-Test Power | powerConsumption35inter | W | Required | NA |
| H32-Test Power | powerConsumption17full | W | Required | NA |
| (opt)H4-Test Power | powerConsumption5full | W | when H42 Tested is TRUE | NA |
| A2/H1N-Test Std.Airflow, scfm | scfm95full | scfm | when Need Coil-Only Adjustment is TRUE | calculated standard airflow at A2-Test or H1N (for heating only HP) Test |
| H01-Test Std.Airflow, scfm | scfm62min | scfm | when Need Coil-Only Adjustment is TRUE | calculated standard airflow at H01-Test |
| (opt)H12-Test Std.Airflow, scfm | scfm47full | scfm | when Need Coil-Only Adjustment and H12 Tested are TRUE | calculated standard airflow at H12-Test |
| H11-Test Std.Airflow, scfm | scfm47min | scfm | when Need Coil-Only Adjustment is TRUE | calculated standard airflow at H11-Test |
| H1N-Test Std.Airflow, scfm | scfm47nominal | scfm | when Need Coil-Only Adjustment is TRUE | calculated standard airflow at H1N-Test |
| (opt)H22-Test Std.Airflow, scfm | scfm35full | scfm | when Need Coil-Only Adjustment and H22 Tested are TRUE | calculated standard airflow at H22-Test |
| H2v-Test Std.Airflow, scfm | scfm35inter | scfm | when Need Coil-Only Adjustment is TRUE | calculated standard airflow at H2v-Test |
| H32-Test Std.Airflow, scfm | scfm17full | scfm | when Need Coil-Only Adjustment is TRUE | calculated standard airflow at H32-Test |
| (opt)H4-Test Std.Airflow, scfm | scfm5full | scfm | when Need Coil-Only Adjustment and H4 Tested are TRUE | calculated standard airflow at H4-Test |
Calculation Results
When downloaded, the results are concatenated if the variable is determined at each bin temperature. For example, ratioTotalPower1, ratioTotalPower2, ratioTotalPower3, etc.
| Result Variable Name | Unit | Description |
|---|---|---|
| capacities and powers | Btu/hr, W | Imported from the input dataset. Depending on setup types (e.g., coil-only), quantities may have been adjusted. |
| heatCapacity47full_calc | Btu/hr | Estimated capacity when H12 test is not conducted |
| powerConsumption47full_calc | W | Estimated capacity when H12 test is not conducted |
| DHR | Btu/hr | Design Heating Requirements, DHR predicts the space heating load of a residence when subjected to outdoor design conditions. Estimates for the minimum and maximum DHR are provided for six generalized U.S. climatic regions in section 4.2 of this appendix M. Only used in Appendix M. |
| buildingHeatLoad | Btu/hr | building heating load, which is calculated based on test unit capacity over bin tempreratures. |
| heatCapacity35min_est | Btu/hr | By using equation (4.2.4-1), estimate capacity at minimum compressor speed at 35F outdoor temperature, whether minimum speed limiting or not |
| powerConsumption35min_est | W | By using equation (4.2.4-1), estimate power consumption at minimum compressor speed at 35F outdoor temperature, whether minimum speed limiting or not |
| N_Q | dimensionless | Capacity Slope or Ratio between minimum compressor speed and intermediate compressor speed |
| N_E | dimensionless | Power Slope or Ratio between minimum compressor speed and intermediate compressor speed |
| M_Q | dimensionless | Finding Centroid of the variable speed operation based by incorporating k=1 (minimum), k=2 (maximum), and k=i (intermediate) compressor speed capacities |
| M_E | dimensionless | Finding Centroid of the variable speed operation based by incorporating k=1 (minimum), k=2 (maximum), and k=i (intermediate) compressor speed power consumptions |
| binHeatCapacityInter | Btu/hr | Interpolated/Extrapolated heat capacity at intermediate compressor speed, based on tested capacities over bin temperatures, Btu/hr. |
| binPowerConsumptionInter | W | Interpolated/Extrapolated heat capacity at intermediate compressor speed, based on tested capacities over bin temperatures, Btu/hr. |
| binHeatCapacity_k2 | Btu/hr | Interpolated/Extrapolated heat capacity at maximum compressor speed, based on tested capacities over bin temperatures, Btu/hr. |
| binPowerConsumption_k2 | W | Interpolated/Extrapolated heat capacity at minimum compressor speed, based on tested capacities over bin temperatures, Btu/hr. |
| binHeatCapacity_k1 | Btu/hr | Interpolated/Extrapolated electrical power at maximum compressor speed, based on tested capacities over bin temperatures, W. |
| binPowerConsumption_k1 | W | Interpolated/Extrapolated electrical power at minimum compressor speed, based on tested capacities over bin temperatures, W. |
| cutOut_delta | dimensionless | cut out factor is a value among 0, ½, and 1 that indicates the heat pump compressor is operating with certain stages or single speed at certain bin temperatures. |
| cutOut_delta_prime | dimensionless | cut out factor prime defined in M/M1 Section 4.2.4.3 is used at bin temperatures with the high compressor-speed-only operation. Using 4.2.3.4 definition of delta, Cut Out Prime |
| ratioTotalHeating | Btu/hr | the amount of heat capacity supplied to the building multiplied by fractional bin hours (nj/N) per each bin temperature, Btu/hr. |
| ratioTotalResistHeating | W | The ratio of the electrical energy used for resistive space heating during periods when the outdoor temperature fell within the range represented by bin temperature Tj to the total number of hours in the heating season (N), W. |
| ratioTotalPower | W | The ratio of the electrical energy consumed by the heat pump during periods of the heating season when the outdoor temperature fell within the range represented by bin temperature Tj to the total number of hours in the heating season (N), W. |
| HSPF | Btu/hr-W | NA |
Testing Conditions
Table 1. Testing Conditions in Appendix M
Testing Flowchart of Appendix M
Appendix M had a drastic change from the 2017 to the 2018 Federal Register version in the variable speed Heat Pump testing conditions and testing requirements. The following flow chart is AHRI’s interpretation of the language.
Table 2. Testing Conditions and Flowchart in Appendix M1
Testing Flowchart of Appendix M1
Due to revised definitions of the H1N and H12 testing compressor speeds, Appendix M1 has minor difference in the testing flow chart from Appendix M. The following flow chart is AHRI’s interpretation of the language.
For the full detail, please download results.
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HSPF & HSPF2 Calculation for Triple Stage Nothern Heat Pump
Input Table
You can change/edit/delete/download by left-click or right-click.
For calculations, please allow some moment to repopulate results and plots.
About the Input Parameters and Calculations
HSPF/HSPF2 of a Heat Pump Having a Variable-Speed Compressor
AHRI does its best to provide the most accurate information regarding interpretation of the codes, documents, and standards. If there is any information that needs to be corrected or updated, please contact us.
Input Parameters
NOTE: otherwise noted, all parameters are minimal information to calculation SEER or HSPF.
NOTE: non-mandatory field does not affect calculations.
NOTE: input inconsistency may occur if full information is not provided.
e.g., H4 tested: TRUE, H4-Test Capacity: missing
| Name Shown in Input Table | Name Used for Calculation | Unit | Data Requirement | Description |
|---|---|---|---|---|
| Compressor Type | compressorDesignStage | NA | Not Required | Should be Variable Speed |
| ID Blower Type | indoorBlowerType | NA | Not Required | Should be one of the following: Fixed Speed / PSC, Fixed Speed / Constant Torque, Constant Volume Rate, Coil-only |
| Need Coil-only Adjustment | needCoilOnlyAdjust | NA | Required | The indoor unit is coil-only and the calculation needs capacity and power adjustment, Appendix M |
| Mobile home, Space Constrained | isMobileHomeAndSpaceConstrained | NA | when Need Coil-Only Adjustment is TRUE | The indoor unit is mobile-home type and space constrained. In Appendix M1, coil-only types are further divided with different adjustment coefficients |
| Non-mobile Home, Non-space Constrained | isNonmobileHomeAndNonSpaceConstrained | NA | when Need Coil-Only Adjustment is TRUE | The indoor unit is non-mobile-home type and Space Constrained. In Appendix M1, coil-only types are further divided with different adjustment coefficients |
| Is Split Unit | isSplit | TRUE/FALSE | Required | NA |
| Does Comp Limit Min-Spd | minSpeedLimiting | TRUE/FALSE | Only if available | Appendix M1 notices the variable speed control that limits minimum speed at lower outdoor temperatures. |
| H12 Tested | H12Tested | TRUE/FALSE | Only if available | NA |
| H22 Tested | H22Tested | TRUE/FALSE | Only if available | NA |
| H42 Tested | H42Tested | TRUE/FALSE | Only if available | NA |
| H1N Comp Spd = H32 Comp Spd | H1NspeedMax17 | TRUE/FALSE | Only if available | Appendix M and M1 both compare nominal compressor speeds at H1N test to low tempreature high compressor speeds at H32 test. Please refer to the testing flow charts below. |
| Shut Off Temperature | T_off | F | Only if available | NA |
| Turn On Tempearture | T_on | F | Only if available | NA |
| Demand Defrost Credit | demandDefrostCredit | dimensionless | Required | NA |
| Degradation Coeff | degCoeffHeat | dimensionless | Required | NA |
| A2-Test Capacity | coolCapacity95Full | Btu/hr | Required | Appendix M1 uses A-Test for Heating Load calculation while M1 uses H1-Test Capacity. For heating-only HP, provide H1N or H12 instead. Note: DOE does not specify which test among H1N and H12 to be used for heating only HPs. |
| H01-Test Capacity | heatCapacity62min | Btu/hr | Required | NA |
| (opt)H12-Test Capacity | heatCapacity47full | Btu/hr | when H12 Tested is TRUE | NA |
| H11-Test Capacity | heatCapacity47min | Btu/hr | Required | NA |
| H1N-Test Capacity | heatCapacity47nominal | Btu/hr | Required | NA |
| (opt)H22-Test Capacity | heatCapacity35full | Btu/hr | when H22 Tested is TRUE | NA |
| H2v-Test Capacity | heatCapacity35inter | Btu/hr | Required | NA |
| H32-Test Capacity | heatCapacity17full | Btu/hr | Required | NA |
| (opt)H4-Test Capacity | heatCapacity5full | Btu/hr | when H42 Tested is TRUE | NA |
| H01-Test Power | powerConsumption62min | W | Required | NA |
| (opt)H12-Test Power | powerConsumption47full | W | when H12 Tested is TRUE | NA |
| H11-Test Power | powerConsumption47min | W | Required | NA |
| H1N-Test Power | powerConsumption47nominal | W | Required | NA |
| (opt)H22-Test Power | powerConsumption35full | W | when H22 Tested is TRUE | NA |
| H2v-Test Power | powerConsumption35inter | W | Required | NA |
| H32-Test Power | powerConsumption17full | W | Required | NA |
| (opt)H4-Test Power | powerConsumption5full | W | when H42 Tested is TRUE | NA |
| A2/H1N-Test Std.Airflow, scfm | scfm95full | scfm | when Need Coil-Only Adjustment is TRUE | calculated standard airflow at A2-Test or H1N (for heating only HP) Test |
| H01-Test Std.Airflow, scfm | scfm62min | scfm | when Need Coil-Only Adjustment is TRUE | calculated standard airflow at H01-Test |
| (opt)H12-Test Std.Airflow, scfm | scfm47full | scfm | when Need Coil-Only Adjustment and H12 Tested are TRUE | calculated standard airflow at H12-Test |
| H11-Test Std.Airflow, scfm | scfm47min | scfm | when Need Coil-Only Adjustment is TRUE | calculated standard airflow at H11-Test |
| H1N-Test Std.Airflow, scfm | scfm47nominal | scfm | when Need Coil-Only Adjustment is TRUE | calculated standard airflow at H1N-Test |
| (opt)H22-Test Std.Airflow, scfm | scfm35full | scfm | when Need Coil-Only Adjustment and H22 Tested are TRUE | calculated standard airflow at H22-Test |
| H2v-Test Std.Airflow, scfm | scfm35inter | scfm | when Need Coil-Only Adjustment is TRUE | calculated standard airflow at H2v-Test |
| H32-Test Std.Airflow, scfm | scfm17full | scfm | when Need Coil-Only Adjustment is TRUE | calculated standard airflow at H32-Test |
| (opt)H4-Test Std.Airflow, scfm | scfm5full | scfm | when Need Coil-Only Adjustment and H4 Tested are TRUE | calculated standard airflow at H4-Test |
Calculation Results
When downloaded, the results are concatenated if the variable is determined at each bin temperature. For example, ratioTotalPower1, ratioTotalPower2, ratioTotalPower3, etc.
| Result Variable Name | Unit | Description |
|---|---|---|
| capacities and powers | Btu/hr, W | Imported from the input dataset. Depending on setup types (e.g., coil-only), quantities may have been adjusted. |
| heatCapacity47full_calc | Btu/hr | Estimated capacity when H12 test is not conducted |
| powerConsumption47full_calc | W | Estimated capacity when H12 test is not conducted |
| DHR | Btu/hr | Design Heating Requirements, DHR predicts the space heating load of a residence when subjected to outdoor design conditions. Estimates for the minimum and maximum DHR are provided for six generalized U.S. climatic regions in section 4.2 of this appendix M. Only used in Appendix M. |
| buildingHeatLoad | Btu/hr | building heating load, which is calculated based on test unit capacity over bin tempreratures. |
| heatCapacity35min_est | Btu/hr | By using equation (4.2.4-1), estimate capacity at minimum compressor speed at 35F outdoor temperature, whether minimum speed limiting or not |
| powerConsumption35min_est | W | By using equation (4.2.4-1), estimate power consumption at minimum compressor speed at 35F outdoor temperature, whether minimum speed limiting or not |
| N_Q | dimensionless | Capacity Slope or Ratio between minimum compressor speed and intermediate compressor speed |
| N_E | dimensionless | Power Slope or Ratio between minimum compressor speed and intermediate compressor speed |
| M_Q | dimensionless | Finding Centroid of the variable speed operation based by incorporating k=1 (minimum), k=2 (maximum), and k=i (intermediate) compressor speed capacities |
| M_E | dimensionless | Finding Centroid of the variable speed operation based by incorporating k=1 (minimum), k=2 (maximum), and k=i (intermediate) compressor speed power consumptions |
| binHeatCapacityInter | Btu/hr | Interpolated/Extrapolated heat capacity at intermediate compressor speed, based on tested capacities over bin temperatures, Btu/hr. |
| binPowerConsumptionInter | W | Interpolated/Extrapolated heat capacity at intermediate compressor speed, based on tested capacities over bin temperatures, Btu/hr. |
| binHeatCapacity_k2 | Btu/hr | Interpolated/Extrapolated heat capacity at maximum compressor speed, based on tested capacities over bin temperatures, Btu/hr. |
| binPowerConsumption_k2 | W | Interpolated/Extrapolated heat capacity at minimum compressor speed, based on tested capacities over bin temperatures, Btu/hr. |
| binHeatCapacity_k1 | Btu/hr | Interpolated/Extrapolated electrical power at maximum compressor speed, based on tested capacities over bin temperatures, W. |
| binPowerConsumption_k1 | W | Interpolated/Extrapolated electrical power at minimum compressor speed, based on tested capacities over bin temperatures, W. |
| cutOut_delta | dimensionless | cut out factor is a value among 0, ½, and 1 that indicates the heat pump compressor is operating with certain stages or single speed at certain bin temperatures. |
| cutOut_delta_prime | dimensionless | cut out factor prime defined in M/M1 Section 4.2.4.3 is used at bin temperatures with the high compressor-speed-only operation. Using 4.2.3.4 definition of delta, Cut Out Prime |
| ratioTotalHeating | Btu/hr | the amount of heat capacity supplied to the building multiplied by fractional bin hours (nj/N) per each bin temperature, Btu/hr. |
| ratioTotalResistHeating | W | The ratio of the electrical energy used for resistive space heating during periods when the outdoor temperature fell within the range represented by bin temperature Tj to the total number of hours in the heating season (N), W. |
| ratioTotalPower | W | The ratio of the electrical energy consumed by the heat pump during periods of the heating season when the outdoor temperature fell within the range represented by bin temperature Tj to the total number of hours in the heating season (N), W. |
| HSPF | Btu/hr-W | NA |
Testing Conditions
Table 1. Testing Conditions in Appendix M
Testing Flowchart of Appendix M
Appendix M had a drastic change from the 2017 to the 2018 Federal Register version in the variable speed Heat Pump testing conditions and testing requirements. The following flow chart is AHRI’s interpretation of the language.
Table 2. Testing Conditions and Flowchart in Appendix M1
Testing Flowchart of Appendix M1
Due to revised definitions of the H1N and H12 testing compressor speeds, Appendix M1 has minor difference in the testing flow chart from Appendix M. The following flow chart is AHRI’s interpretation of the language.
For the full detail, please download results.
About this Application by
This SEER2 and HSPF2 calculation application is originally developed for ASHRAE Presentation “Test procedure changes in DOE Appendix M1 and compliance with the residential air conditioners and heat pumps standards in 2023” in January 2017.
Disclaimer
The tool is just for information, the regulations hold the manufacturer ultimately responsible for compliance with all published requirements, and we disclaim any liability for errors in the program.
About development team
Air-Conditioning, Heating, Refrigeration Institute (AHRI)
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The Air-Conditioning, Heating, and Refrigeration Institute (AHRI) is the trade association representing manufacturers of HVACR and water heating equipment within the global industry.
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