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    shablue55's Avatar
    shablue55 Posts: 61, Reputation: 1
    Junior Member
    		  
    #1

    Jan 31, 2010, 11:54 AM
    Furnace filters
    Just recently heard of Garrison furnace filters. Do they compare to 3M filters? I see that the only MERV rating is 8. Has anybody used them?
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Jan 31, 2010, 03:57 PM
    It they restrict the air flow too much they will damage your equipment or cause major problems.
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