http://www.youtube.com/watch?v=MlJII80n8C8
Troubleshooting and Heat Pump Repair in Charleston
A heat pump not only heats your home during the winter, it also cools it during the summer. It does not burn fuel to produce heat nor does the electricity it consumes go through an element. The heat pump functions on the same principle as refrigerators and a/c: A liquid absorbs heat as it turns into a gas and releases heat as it returns to a liquid state.
During the summer, the heat pump operates as a standard central air conditioner: It removes heat from the house and vents it to the outside. A liquid refrigerant is pumped through an evaporator coil of tubing. The liquid expands as it moves through the coil, changing to its gaseous state as it absorbs heat from the air surrounding the coil.
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