The purpose of this project was to evaluate the impact of heat conduction losses through attic ductwork on the energy performance of variable capacity heat pumps (VCHP). Four duct scenarios were evaluated:Ducts in conditioned spaceAttic ductwork with surface area and insulation typical of...

This project evaluates the performance of a production prototype residential three-function heat pump (TFHP) system. TFHPs are called “three function” systems as they utilize a single compressor to serve indoor heating, indoor cooling, and domestic hot water loads. The system evaluated in this...

The California Air Resources Board and Southern California Edison recognized the need for robust primary research among key decision-makers to help California achieve the state’s ambitious climate goals – specifically through the adoption of zero-emission appliances such as heat pump water heaters,...

This Demand Response Emerging Technology (DRET) Voice Automation demonstration project (pilot) leveraged residential voice-assistant technology (i.e., Amazon’s Alexa smart speaker) as well as cellular telephone app functionality to engage with and educate residential customers on energy usage, bill...

The 2022 C&S Planning and Coordination Key Initiatives Report presents the activities and achievements of the P&C subprogram in the program’s five elements: Decarbonization, Grid Harmonization, Code Harmonization, Strategic Planning and Coordination, and Program Coordination. For the...

Residential heat pump space conditioning and water heating can greatly reduce energy consumption compared to typical natural gas combustion or electric resistance equipment. Multi-function heat pumps are a product type that uses one efficient outdoor compressor and heat exchanger unit to provide...

The persistence of Covid-19 and remote work is driving new patterns of variable and unpredictable occupancy in commercial offices, where work flexibility is the new norm and employees may go to the office irregularly or infrequently. In many instances, this may become the new norm. As a result,...

AESC proposes a market evaluation study of solar assisted heat pumps, a technology that promises to provide supplemental, carbon-free heating to any variable-speed pump air conditioner in the 2-ton to 10-ton range – and thus is applicable to residential split heat pumps and small commercial split...

Currently, incentives for energy efficient water heater retrofits require a like-for-like replacement. However, there is anecdotal evidence that contractors upsize heat pump water heater replacements relative to existing gas water heaters. This project adds to current statewide water heating...

This study will identify the electrical service requirements for various sizes of foodservice facilities such as quick serve, full service, cafeterias, and hospitality. This will help understand the costs, electrical load requirements, electrical service upgrade costs, and potential electrical load...