What temperature does a heat pump stop working?
Similarly, you may ask, what temperature is a heat pump not effective?
If you are impatient, I won't make you wait; heat pumps don't work well below 25-30 degrees Fahrenheit. But what you might not know is that the heat pump temperature range is broader than most people think, and with the addition of supplemental heating it can work even in the chilliest of temperatures.
Beside this, do heat pumps work below 20 degrees?
A central air-to-air heat pump outside your home can remove heat from the ambient air and apply that heat to your home. Historically, below 20 degrees, air-source heat pumps drop in efficiency to 100 percent (no better that electric radiant heat). They do not drop below 100 percent efficiency.
During the winter, heat pumps operate like an air conditioner in reverse. The refrigerant absorbs heat from the air outside and uses it to warm your home. In fact, most heat pumps can efficiently absorb heat from the air outside down to as cold as 20 degrees or lower!