the heat that a heat pump uses as as supplement
increases the effieciency of the heat pump
Coefficient of Performance
determined from the heat pumps heating output divided by the input
the flow reverses from season to season
normally instigated by the time and temperature and terminates by the time or temperature
Air to Air Heat Pump
loses capacity as the outside temperature goes down
controlled with a switch in the room thermostat
occurs when the heat pump is pumping exactly as much heat as the structure is leaking out
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