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You lost me. Heat pumps are units containing a compressor and sit on top of the ground. A little more info would be helpful. I think you are talking about the subterranium units. They are quite deep.

2007-11-30 08:04:55 · answer #1 · answered by sensible_man 7 · 1 0

here is very good read
http://www.eere.energy.gov/consumer/your_home/space_heating_cooling/index.cfm/mytopic=12670

2007-11-30 16:03:43 · answer #2 · answered by Tio 6 · 0 0

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