Heat Pump Balance Point Calculator
At what temperature does a heat pump stop working?
Standard air-source heat pumps keep producing usable heat into the teens, but their capacity and efficiency drop as it gets colder, and most need auxiliary heat below their balance point. Cold-climate (variable-speed) heat pumps maintain strong output to 0°F or below. The "stop" point is really where backup heat takes over, set by the balance point — not a hard cutoff.
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Use the Heat Pump Balance Point Calculator to get an exact answer for your inputs.
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