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    May 24, 2012, 07:21 AM
    heat pump two stage vs single stage variable speed
    I have a three story house with a single unit that needs replacing. One vendor is recommending a single stage compressor because the furnace will have a variable speed fan. He says the fan speed & lower stage on the compressor will prevent cool air from ever reaching the top floor. Others say I need a two stage with a variable speed fan. Which is accurate?

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