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RETAC Project

Advanced Heat Pump Water Heater Research (TIP 292)

Created 6/6/2017 by Tyler Dillavou
Updated 11/13/2019 by Conduit Admininistrator
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Contact and Funding
Lead Org(s): Bonneville Power Administration
Primary: Janice Peterson 503-230-3543 jcpeterson@bpa.gov
Product Components
CO2 Heat Pump Water Heater
Project Objectives: The Sanden GAU CO2 refrigerant, split-system heat pump water heater was tested in both lab tests and at four field sites representing the three heating zones in the Pacific Northwest. This report focuses on the field tests and the data and experience collected over almost two years of monitoring. The test data show these systems can provide the hot water needs of a family of up to seven without backup heat during a cold winter (with low temperatures ranging from almost -16�F in Montana, 2�F in Spokane, and the 20s�F in Portland and Tacoma). The energy needed to heat water in the field study averaged approximately 0.05 kWh per gallon used. This is half the energy needed by standard unitary HPWHs. When the final product is UL listed, it will be tested in the laboratory to confirm performance.
Current Project Phase: Completed
Current Project Status: more research
Project Outcome: Not Specified
Notes on Project Outcome: N/A
Additional Information
Attached Files
Interested / Collaborative RETAC Organizations
Project Geography
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