One of the first lessons that air source heat pump owners learn is that it costs less to keep your heat pump running all the time, day and night than it does to turn it off and on. Air source heat pumps have a lower flow temperature (the temperature of the water that they pump through your system) than gas boilers, which makes them much more energy efficient. They’re designed to keep your home at a constant temperature rather than pumping out a lot of heat quickly. You'll sav