No matter the temperature, there is always some warmth in the air. When you need to cool your home, an ASHP outperforms standard central air conditioners by extracting the existing heat from inside your home and pumping it outside.
The cooling process is reversed when you use your ASHP to provide supplemental heat.
By extracting the existing warmth from the outdoor air and pumping it into your home,
you'll be able to run your furnace less. During the spring and fall, you may not need
to run your furnace at all.