furnace cold air return

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jenn4239

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Oct 15, 2011
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I have a high energy efficiention furnace and I have no cold air returns yet! I do however have the filter installed will it hurt my furnace to run a couple weeks without the cold air return?? As long as its not blocked!
 
No, on a high efficiency furnace you will have a separate air intake for combustion air so you should be fine.
 
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