ET25SWG0002 - Gas-Fired Heat Pump Water Heating - Phase 2F – Site #3

This project is a field study of a Gas Absorption Heat Pump (GAHP) water heater. The GAHP is a gas-fired technology with a technology readiness level (TRL) of 9. This project falls into phase 2F (field study phase) of a multi-phase field study pilot project for GAHP water heaters & combination systems. Phase 1 of this pilot was completed to address the initial planning and data gathering necessary for phase 2F to launch. Phase 2F plans to have installations in four (4) sites total, but the other three (3) sites are not part of this scope. For reference, Phase 2F Site #1 and Site #2 are currently underway.

This project is for Site #3 in phase 2F. Site #3 is at a multifamily building.

This study will determine the coefficient of performance (COP) of the baseline domestic hot water system (DHW) and the post-installation DHW system with the GAHP serving the base water heating load. This study will also determine the greenhouse gas (GHG) impacts of the GAHP water heater vs. an electric heat pump water heater as well as the operational costs for each. Additionally, this study will compare field performance data with lab performance data. Lastly, this study will provide lessons learned for SoCalGas and GAHP installation contractors in a DHW-only application.