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All Renewable Thermal Generation Units must:
An around source heat pump uses compression and evaporation to transfer thermal energy from the ambient air to a thermal load as Useful Thermal Energy. There are several requirements in order for air source heat pump Generation Units to be eligible. For a list of eligibility requirements, please see the APS regulations, beginning on page 19. Please note while utilizing air source heat pumps for cooling is allowed, only the Useful Thermal Energy used for heating is eligible to generate AECs.
To submit a Statement of Qualification application (SQA), please visit the APS Renewable Thermal Application Portal.
For more information on renewable thermal in the APS, please visit our APS Statement of Qualification webpage.
The size classifications for air source heat pump Generation Units are as follows:
Air source heat pump; electric motor or engine driven
Output capacity less than or equal to 134,000 Btu per hour
Output capacity between 134,000 and 1,000,000 Btu per hour
Output capacity greater than or equal to 1,000,000 Btu per hour
The multipliers for air source heat pump Generation Units are as follows:
Air source heat pumps (electric or engine driven) –supplying less than 100% of building heating load
Air source heat pump (electric or engine driven) –all other
For small ASHP Generation Units to be eligible a multiplier of three, the Generation Unit must supply 100% of a building’s total annual heat load and if it is installed in an existing building, the non-renewable heat source must be removed.
In addition to the above multipliers, any air source heat pump installed in a building shall be eligible for an additional multiplier of 2 (added to the base multiplier) if the building meets any of the following criteria:
More information on these multipliers can be found in the Guideline on Multipliers for Renewable Thermal Generation Units.
An air source heat pump uses compression and evaporation to transfer thermal energy from the ambient outdoor environment to a thermal load as Useful Thermal Energy. To be eligible, an air source heat pump Generation Unit must be:
For a list of current APS eligible small ASHP, see the link below.
APS Eligible Small Air Source Heat Pumps
In new construction, all small ASHPs must supply 100% of a building’s total annual heat load; non-renewable supplemental heat sources are prohibited.
In existing buildings where an ASHPs supplies 100% of the building’s total annual heat load, the non-renewable heat source must be removed.
Air source heat pumps that supply less than 100% of the building heating load must:
Small air source heat pump Generation Units are eligible for preminting, which allows the owner to receive 10 years of AECs upfront. After reviewing and approving the application for the Generation Unit, DOER will calculate the 10 year strip of AECs to be minted. The calculation is as follows:
More information on this calculation can be found in the Guideline on Metering and Calculating the Useful Thermal Output for Renewable Thermal Generation Units – Part 1 (Calculations for Small and Intermediate Generation Units).
All small air source heat pump Generation Units are required to submit the following in their Statement of Qualification Application:
Intermediate and large air source heat pump Generation Units will receive AECs, based on their metered production, on a quarterly basis. Generation Unit owners should review the Guideline on Metering and Calculating the Useful Thermal Output for Renewable Thermal Generation Units – Part 2 (Metering for Intermediate and Large Generation Units) for information on metering requirements.
All intermediate and large air source heat pump Generation Units are required to submit the following in their Statement of Qualification Application: