Abstract: This Best Practices Guide provides designers and installers of variable capacity heat pumps (VCHPs) generic information to ease the selection and installation of this equipment and improve performance and comfort. The content is derived from five years of VCHP evaluations completed at...

VEIC will investigate the potential market opportunity and decarbonization impact of installing propane-based air-to-water heat pumps (AWHPs) in residential and commercial buildings across California. Traditional heat pumps use hydrofluorocarbon (HFC) and/or hydrofluroolefin (HFO) synthetic...

California eTRM (Electronic Technical Reference Manual) already offers a statewide deemed measure for clean water pumps, providing energy savings values and a path for payment of rebates for pump replacement and improving their efficiency. However, wastewater pumps do not currently have a...

This research was performed to help those involved with the development and implementation of California’s Title 24, Part 6, Building Energy Efficiency Standards (“Title 24”), better understand the real-world performance of dedicated outdoor air systems (DOAS) and variable refrigerant flow (VRF)...

PG&E’s Demand Response Emerging Technology (DRET) Program initiated a residential Battery Study to investigate the potential to utilize residential photovoltaic solar systems paired with a home battery system to support state electric grid reliability. PG&E designed the study to learn...

This project involves a market characterization study for Industrial Heat Pumps. Industrial Heat pumps are heat pumps that are used in large-scale industrial processes. Standard heat pumps are generally used for residential and small-scale commercial applications. Industrial heat pumps, on the...

This project will analyze the current CA eTRM measure packages for residential Heat Pump Water Heaters (HPWH) based on market and product data to identify gaps and recommend enhancements to the measure offerings. The final report will be delivered to the California Technical Forum and other eTRM...

Several past studies tested air-leakage rates in multifamily buildings and dwelling unit compartmentalization rates, but most of these studies were performed in colder climate states and are not directly transferable to California. Therefore, there is a general lack of California specific...

Abstract: In 2021 PG&E’s Code Readiness Program research team (Research Team) initiated an evaluation and data collection of nonresidential hydronic heat pump (HP) heating equipment across California. The intent of the data collection effort was to better understand how hydronic HPs perform...

The current California Building Standards Code, Title 24, does not include minimum ventilation requirements for residential heat pump water heaters (HPWH). Building owners across California are installing HPWHs in small closets without adequate ventilation, leading to high...