donkpow Posted October 20, 2017 Share #1 Posted October 20, 2017 Talking HVAC. Twinning two furnaces is using two furnaces simultaneously instead of one huge unit. I'm looking at an installation that has 2 stage heating and single stage cooling on two units. There is a third unit that is connected to the same duct system that is used for cooling only. The complaint is that air flow is too great in the cooling mode. What advice should I offer? Link to comment Share on other sites More sharing options...
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