04-22-10, 09:55 PM
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#2
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Journeyman EcoRenovator
Join Date: Dec 2009
Location: Maynard, MA Eaarth
Posts: 383
Thanks: 78
Thanked 39 Times in 32 Posts
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These are the best commercially available dual stage heat pumps I know of:
Hallowell International - Heating and Cooling Systems |
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