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Project Info ACTIVE Project Title

High Efficiency Dehumidification System Field Study

Project Number ET22SWE0040 Organization SWE (Statewide Electric ETP) End-use HVAC Sector Residential Project Year(s) 2022 - 2025
The High Efficiency Dehumidification System (HEDS) technology of interest is a new and patented technology developed in Southern California with energy savings potential for air handlers with chilled water cooling and hot water reheat. The technology was first developed to address dehumidification issues but has evolved to include and leverage energy efficiency benefits. The technology reduces loads on both the chiller and reheat water source by expanding dehumidification and reheat coils, lowering chilled water flows, and utilizing dehumidification coil outlet flow for reheat purposes. This saves energy over the typical baselined design that has separate dedicated, higher flow chilled water and hot water coils. The technology supports decarbonization and electrification by eliminating the natural gas consumption common in hot water reheat systems (an important component of dehumidification) while also reducing energy consumption at the chiller. The dehumidification aspects also make the technology a good candidate for providing superior protection against COVID and other airborne viruses. The technology is commercially available and most applicable to buildings with humidity concerns such as hospitals, commercial kitchens, museums, and prisons. However, it can be installed at any facility with single duct system with reheat that is often applied in large commercial buildings, public sector facilities, high schools, and universities.
  • Pacific Gas & Electric Company logo
  • Southern California Edison Company logo
  • Southern California Gas Company logo
  • San Diego Gas & Electric Company logo
  • Sacramento Municipal Utility District logo
  • Los Angeles Department of Water and Power logo
  • CEC logo

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The ETCC is funded in part by ratepayer dollars and the California IOU Emerging Technologies Program, the IOU Codes & Standards Planning & Coordination Subprograms, and the Demand Response Emerging Technologies (DRET) Collaborative programs under the auspices of the California Public Utilities Commission. The municipal portion of this program is funded and administered by Sacramento Municipal Utility District and Los Angeles Department of Water and Power.