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Title: Field Performance of Inverter-Driven Heat Pumps in Cold Climates

CARB observed a wide range of operating efficiencies and outputs from site to site. Maximum capacities were found to be generally in line with manufacturer's claims as outdoor temperatures fell to -10°F. The reasons for the wide range in heating performance likely include: low indoor air flow rates, poor placement of outdoor units, relatively high return air temperatures, thermostat set back, integration with existing heating systems, and occupants limiting indoor fan speed. Even with lower efficiencies than published in other studies, most of the heat pumps here still provide heat at lower cost than oil, propane, or certainly electric resistance systems.
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  1. Consortium for Advanced Residential Buildings, Norwalk, CT (United States)
Publication Date:
OSTI Identifier:
Report Number(s):
Resource Type:
Technical Report
Research Org:
Consortium for Advanced Residential Buildings, Norwalk, CT (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Building Technologies Office (EE-5B)
Country of Publication:
United States
Residential; Residential Buildings; CARB; Building America; inverter-driven; air-source heat pumps; Steven Winter Associates, Inc.; Consortium for Advanced Residential Buildings; SWA; COPs; cold climate; Northeast; performance; heating; air flow measurement; heat pump; ASHP