I did physics at school and was quite good at it,but don't have time to explain so I google it for you.Next time try google..
Heat pumps transfer heat from one place to another--providing both heating and cooling. They work on the fundamental principle that heat exists in air even at extremely low temperatures--down to -460 degrees F. In the winter, a heat pump extracts heat from outside air and delivers it indoors. To cool a house on hot summer days, it works in reverse, extracting heat from room air and pumping it outdoors. The process is a bit technical, but here's a brief look at how they work:
Air-source heat pumps. The most common type of heat pump is an "air-source" system. "Split" air-source systems have an outdoor unit which includes a compressor, outdoor coil, fan and reversing valve. That unit is connected with refrigerant-filled tubing to an indoor component. The indoor unit contains a fan, indoor coil and a supplemental resistance heating element. "Package" systems combine both components in a single unit that's typically placed on the roof
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Jul 21, 2007 @ 04:29:14
