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  1. #1
    Join Date
    Oct 2013
    Posts
    1

    Default Block off air duct

    We recently added on and I was wondering if I could use the existing air duct that heated our old upstairs (which won't get used very often anymore, only for company) and re-route it into the addition since we need more heat in that area. I'd like to leave the existing duct work in place, and was thinking of using some sort of a wye with a damper-like apparatus to block off the airflow going into the old living space..

  2. #2
    Join Date
    Jul 2010
    Location
    SoCal
    Posts
    6,598

    Default Re: Block off air duct

    You can do it, but it will weaken the air flow.

  3. #3
    Join Date
    Dec 2010
    Location
    Houston Texas
    Posts
    2,969

    Default Re: Block off air duct

    Then you'd have to adjust the rest of the system to compensate.

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