The California Plumbing and Energy Codes do not mandate master mixing valves (MMV) for temperature control of domestic hot water (DHW) recirculation systems. Prior lab or field studies has not investigated the energy savings potential of MMV in recirculation systems. While some applications such as...

Water heating for food service applications represents 340M therms of gas consumption in California, and thus presents a significant opportunity for electrification, as well as significant efficiency improvements in retrofits and new construction applications. Public-facing design guides specific...

The proposed project evaluates the current state and anticipated future of Residential Energy and Automation (REA) systems. REA systems are a new category of residential appliances that combine the features of Home Energy Management Systems (HEMS). HEMS energy savings potential have been estimated...

Home space heating, space cooling, and domestic hot water heating loads can be served efficiently by contemporary air to water heat pump technology. Higher operating efficiencies and a shift of loads from peak to non-peak demand periods can be achieved through a shared network of hydronic piping...

Heat pump space conditioning and water heating can greatly reduce energy consumption compared to existing electric resistance or natural gas combustion options. Requirements for electrical service upgrades add cost and installation delays for customers considering heat pumps for space conditioning...

Using swimming pools as heat sinks for air conditioner waste heat has been estimated to reduce air conditioner energy use in California by 25-30% (Harrington and Modera, 2012). There are two primary advantages of rejecting waste heat to an air conditioner instead of ambient air: 1) swimming pool...

The majority of building power distribution systems use alternating current (AC). This significantly influences the design of connected, building system components and appliances such as direct current (DC) appliances. With the proliferation of DC devices as standard design elements across many...

The proposed project is a laboratory evaluation of advanced home energy management systems (HEMS) that will quantify the electrical efficiency associated with advanced distributed energy resource (DER) management features and assess claims of interoperability across a range of communication...

This Focused Pilot project will identify and address the comprehensive set of barriers associated with the purchase and installation of commercial high-efficiency condensing units (HECUs) and high-efficiency evaporator units (HEEUs) used in walk-in coolers and freezers and remote condensing...

This California Low-Income Residential Housing Characteristics Study project proposes to address the lack of complete data on housing structures in disadvantaged communities (DAC) and Hard-to-Reach (HTR) single family residential housing. While high level data such as number of homes in DACs and...