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    nanaleeza's Avatar
    nanaleeza Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Jan 12, 2012, 10:21 AM
    Need to ventilate attic. Help in figure out how many to install.
    Am ventilating a 1800 square foot attic. How many square inches of exhaust should there be? I've been given several answers, which is the correct answer? 2718,1728,211,864.
    ballengerb1's Avatar
    ballengerb1 Posts: 27,378, Reputation: 2280
    Home Repair & Remodeling Expert
    		  
    #2

    Jan 12, 2012, 11:29 AM
    The exhaust venting is proportional to the inlet soffet vents. Attic Vent Calculation
    SpringtimeHomes's Avatar
    SpringtimeHomes Posts: 78, Reputation: 12
    Junior Member
    		  
    #3

    Jan 13, 2012, 08:30 AM
    If they aren't already there, locate your soffit vents as close to the fascia and roof deck as possible. Use continuous strip vents as opposed to the smaller, circular port vents.
    armyjerrysmom's Avatar
    armyjerrysmom Posts: 1, Reputation: 1
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    #4

    Jan 16, 2012, 05:24 PM
    Ok, I quoted different answers from above and I still was not given the right answer. So, help me out. Which is the right answer? 2718, 1728,211,864 of square inches of exhaust ventillation needed for an 1800 sq ft attic?
    ballengerb1's Avatar
    ballengerb1 Posts: 27,378, Reputation: 2280
    Home Repair & Remodeling Expert
    		  
    #5

    Jan 16, 2012, 06:57 PM
    Using the formula I gave in post 2 you need 6 s/f of both soffit and vent. In s/ inches that is 864
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