Heat pumps work fine in cold weather and can save customers lots of money on heating bills by working more efficiently.
A new study from Oxford University and the Regulatory Assistance Project used data from seven field studies across North America, Asia, and Europe which shows thatare two to three times as efficient as combustion or resistive electric heating technology, even in temperatures well below 0°C . In fact they perform significantly better than their fossil fuel-based competitors even in temperatures approaching -30°C .
Typical performance values for heat pumps range from 3 to 6, which indicates that 3 to 6 units of heat are created from each unit of electricity used. A year-round average of 3 to 4 is common for household applications. European winters with average January temperatures above 10º C are classified as “mild cold climates,” whereas those with average temperatures below 10º C in the coldest month are designated “extreme cold climates.
The researchers say concerns over the need for back-up heating during mild cold climate conditions may be unfounded and the role for hybrid systems may be limited. There remains a question over the role of hybrid systems in the coldest climates, not necessarily because of efficiency performance but because of the high output capacity of heat pumps needed at very low temperatures.
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