Basis for Energy Savings
An Air Source Heat Pump Retrofit replaces an existing electric-resistance heating system with an efficient electric ASHP (e.g., add an electric ASHP to a system where one did not previously exist).
An ASHP Upgrade either: 1) replaces an existing electric air source heat pump with a more efficient electric ASHP (e.g., replacing a code minimum heat hump that meets BPA's heat pump efficiency requirements); or 2) is an efficient electric ASHP installed as part of a building addition project, new construction project or major renovation project.
Energy savings were calculated based on analysis of a sampling of heat pump projects completed in BPA territory with the BPA heat pump calculator tool, and which included a whole building billing analysis.
- For Heat Pump Retrofits, the base case heating system is an electric-resistance heating system. The base case cooling system is a 2015 Washington code-compliant cooling system for the purposes of calculating savings above the baseline.
- For Heat Pump Upgrades, the base case is a 2015 Washington code-compliant heat pump for both the cooling and heating savings analysis.
- For both Heat Pump Retrofits and Upgrades, the efficient case used to calculate energy savings is based on an anticipated average project installation representing the 88th percentile of efficiency
Efficiency requirements listed below are based on the 75th percentile of performance for ASHPs per the Air-Conditioning, Heating, and Refrigeration Institute (AHRI) as of January 2019.
Requirements and Specifications
- These measures cannot be used to retrofit packaged terminal air conditioning (PTAC) units.
Preconditions—Heat Pump Retrofit:
- The space is conditioned by zonal or forced-air, electric-resistance heat as the primary heating source. No other heating sources are eligible.
Preconditions—Heat Pump Upgrade:
- The space is conditioned by an operational or failed air source heat pump; or
- The space is part of a building addition, new construction, or a major renovation project.
Post-Conditions:
The installed heat pump must:
- Be an air-to-air heat pump;
- Have an AHRI certificate of product rating; and
- Meet BPA’s efficiency requirements for both heating and cooling per the table below
| Equipment Size (cooling capacity; BTU/H) | Mode | Sub-Category or Rating Condition | Efficiency Requirement |
| <65,000 | Cooling | Split System and Single Package | 16.0 SEER |
| Heating | Split System | 9.0 HSPF |
| Single Package | 8.8 HSPF |
| ≥ 65,000 and < 135,000 | Cooling | Split System and Single Package | 14.0 IEER |
| Heating | 47°F db/43°F wb Outdoor Air | 3.5 COP |
| 17°F db/15°F wb Outdoor Air | 2.4 COP |
| ≥ 135,000 | Cooling | Split System and Single Package | 12.5 IEER |
| Heating | 47°F db/43°F wb Outdoor Air | 3.4 COP |
| 17°F db/15°F wb Outdoor Air | 2.4 COP |
Documentation Requirements
| Documentation Description | Retention/Submittal Locations |
| BPA Energy Efficiency Reporting System | EEDocs@BPA.gov | Customer File |
| End-user identifying information including unique site ID and address | X | | X |
Equipment or contractor invoice showing:- Equipment order or purchase date
- Installed cost
| | | X |
| AHRI Certificate documenting the efficiency requirements have been met | | | X |
| Completed ASHP Project Information Form | | | X |
Payment
Project reporting to BPA is based on whole tons of outdoor cooling capacity and shall be calculated at a project level using one of the following methods:
- Sum the tons from all heat pumps installed, then round to the nearest whole ton; or
- Round each individual heat pump to the nearest whole ton, then sum all rounded tons.
The two methods are provided to accommodate different types of equipment and capacities
| Measure Category | Payment |
| Air Source Heat Pump—Retrofit | $1,000 per ton |
| Air Source Heat Pump—Upgrade | $150 per ton |
