This Old House plumbing and heating expert Richard Trethewey instructs Kevin O’Connor on the basic principles of how a heat pump works.

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The heart of the heating and cooling system will be a heat pump. This Old House plumbing and heating expert Richard Trethewey uses a mock up and props to show host Kevin O’Connor the mechanics of the latest state of the art heating and cooling system. Heat pumps have compressors, valves, and fans that regulate speed and opening so a system can evenly maintain itself and keep temperatures steady to the exact degree.

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How a Heat Pump Works
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