Impact of Installation Faults on Heat Pump Performance

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Numerous studies and surveys indicate that typically-installed HVAC equipment operate inefficiently and waste considerable energy due to varied installation errors (faults) such as improper refrigerant charge, incorrect airflow, oversized equipment, and leaky ducts. This article summarises the results of a large United States (U.S.) experimental/analytical study of the impact that different faults have on the performance of an air-source, single-speed heat pump (ASHP) in a typical U.S. single-family house. It combines building effects, equipment effects, and climate effects in an evaluation of the faults’ impact on seasonal energy consumption through simulations of the house/ASHP pump system.