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  1. #1
    Join Date
    Feb 2005
    Posts
    1
    Would it be wise to disconect the outside air handler when the temps below 40 degrees.This is an all electric system heat and ac

  2. #2
    Join Date
    May 2000
    Location
    Indianapolis, IN, USA
    Posts
    33,886
    Disconnect? Never. I suggest shutting off at the thermostat a lower efficiency timed defrost heat pump in single digits and below (though many disagree) but at 40 degrees, any heat pump is putting out plenty of heat and very effiently.

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