The American Society of Heating, Refrigeration, and Air-Conditioning Engineers (“ASHRAE”) Guideline 36 High-Performance Sequences of Operation for heating, ventilation, and air conditioning (“HVAC”) Systems is considered the best-in-class control sequence in the industry. Several California Energy...

Central heat pump water heater (CHPWH) systems are playing a pivotal role in the decarbonization of multifamily and commercial buildings. These systems can provide electrified, efficient hot water for both new and existing buildings while minimizing grid impact and energy costs with load shifting...

The initiative is centered on exploring and implementing innovative DR methodologies, such as the Whole Home concept, to significantly enhance both customer benefits and grid performance. This strategic program aims to integrate emerging technologies that have DR capabilities, including electric...

Air-to-water heat pumps (AWHPS) have been gaining traction worldwide in countries where hydronic heating is the predominant HVAC option., With the United States increasing national focus on decarbonization of the building sector, the AWHPs market still trails behind other more popular HVAC options....

The Code Readiness research team is conducting field monitoring studies on commercial hybrid HPWH systems installed in nonresidential buildings located in California. The intent of this research is to better understand energy performance of the commercial hybrid 120-gallon HPWH systems recently...

In 2024, PG&E’s Code Readiness Program research team initiated a research project for circulator pumps to identify and estimate energy savings and costs for different types of controls for circulator pumps in multifamily and non-residential buildings. The findings from this research will be...

The Code Readiness research team is conducting field demonstrations on large central heat pump water heater (CHPWH) systems installed in multifamily buildings located in California. The intent of this research is to better understand energy performance of CHPWH systems configured as single-pass and...

The proposed project will study early adopters of virtual commissioning (VCx) programs, a remote type of retro-commissioning program (RRCx), that focuses on HTR small and medium businesses.  A few of these programs are in the incubator and early adopter phases and are located in regional “clumps”...

This project addresses a critical market barrier: the lack of modeling tools capable of simulating distributed Phase Change Material (“PCM”) Thermal Energy Storage Systems (“TESS”) integrated with Central Heat Pump Water Heaters (“CHPWH”). Existing tools are not designed to capture the dynamic...

Research question: How do inefficiencies in the HW distribution system create barriers to central heat pump water heater (CHPWH) installations? What can mitigate these inefficiencies in future installations and prepare commercial buildings for CHPWH retrofits?Hypothesis: if a lack of aggregated...