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Old 12-30-13, 06:59 PM   #9
NiHaoMike
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The unit is the heat pump. As for how it can work as a hot water recirculation setup, if you have it connected to the hot and cold lines under the sink, you can run the pump to move the cold water in the hot line to the cold (needs a reversible pump, thus not practical with off the shelf parts) or just run it to put hot water in the lines.
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