Secondary Author(s)

Parker, Danny; Anello, Michael; Richardson, Katie

Report Number




Heating; Utilities; Heat Pumps


Since Florida utilities often experience their system peak during the state's few cold mornings, understanding influences on space heat performance is important to controlling demand. Analysis of heat pump impacts on system load in a large scale monitoring study have shown large levels of strip heat being used during the winter morning peak. The implied coefficient of performance of heat pumps during the system peak hour was only 1.30. Also, analysis of the total seasonal space heat has shown that the implied Heating Season Performance Factor (HSPF) of heat pump homes is only 4.4 Btu/W rather than the 6-8 Btu/W commonly claimed. This paper describes reasons for the lower than anticipated levels of performance as well as other significant influences on space heating demand.

Date Published



Reference Publication: Bouchelle, M P, D S Parker, M T Anello, and K M Richardson , 2000. "Factors Influencing Space Heat and Heat Pump Efficiency from a Large-­Scale Residential Monitoring Study." Proceedings of 2000 Summer Study on Energy Efficiency in Buildings, American Council for an Energy­-Efficient Economy, 1001 Connecticut Avenue, Washington, DC.

Local Subjects

Heat Pumps; Heating; Utilities


FSEC Energy Research Center® Collection



Rights Statement

In Copyright