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Title: Heat Pump Water Heater Ducting Strategies with Encapsulated Attics in Climate Zones 2 and 4

The focus of this study is on the performance of HPWHs with several different duct configurations and their effects on whole building heating, cooling, and moisture loads. A.O. Smith 60 gallon Voltex (PHPT-60) heat pump water heaters (HPWHs) were included at two project sites and ducted to or located within spray foamed encapsulated attics. The effect of ducting a HPWH's air stream does not diminish its efficiency if the ducting does not reduce intake air temperature, which expands HPWH application to confined areas.
;  [1] ;  [1]
  1. Southface Energy Inst., Atlanta, GA (United States)
Publication Date:
OSTI Identifier:
Report Number(s):
DOE Contract Number:
Resource Type:
Technical Report
Research Org:
Southface Energy Inst., Atlanta, GA (United States). Partnership for Home Innovation
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Building Technologies Office (EE-5B)
Country of Publication:
United States
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION residential; Residential Buildings; PHI; Building America; heat pump water heater; HPWH; ducted; enclosed attic; conditioned attic; sealed attic; water heating; energy efficiency; high performance