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"Insider" indoor heat pump

Richard Moore

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John...there's two blowers. One for circulation, moving air accross the evaporator heat exchanger, and the other for the "outdoor" exchanger. It seems to work in the same way as a split system, but with everything kind of folded up in a single cabinet. And yes, the unit "exhausted" through a very large roof vent (badly flashed) and was drawing outside air from the crawl.

No one else, here or at that "other place", has owned up to seeing one of these before so I guess it is an oddity at best, and totally unsuitable at worst. I told my clients on-site that this was an unknown beast as far as I was concerned and referred them to the ubiquitous "well qualified HVAC contractor" for repair, service, and evaluation. Not necessarily in that order!

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