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    jefmaher's Avatar
    jefmaher Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Nov 10, 2008, 10:21 AM
    Sizing Cold Air return for BSMT
    I'm remodeling my bsmt into an apt, There are 4 heat ducts but no cold air return for the bsmt (there are 2 on the first floor), Do I need to add one for the bsmt (approx 1200 sqf). If how large. Thanks
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Nov 10, 2008, 02:47 PM
    I always use what is called a manual D.

    Understanding Manual D - Air Flow and Duct Design In The Real World - ACCA Store

    I am sure there is a free program for this so look on Google for hvac manual D
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