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  1. #1
    Join Date
    Apr 2005
    Posts
    104

    AC requirements to Home Addition

    Okay, a friend has built an addition to his home...a 24' x 30' family room area.

    The temptation is to simply tee off the existing duct work from the existing house, and extending it to two boots/registers in the new space.

    ...I got a feeling this should be thought out a bit more. I am thinking:

    1) find out how much heat/cooling is required in the new space.

    2) figure out the air flow reqs (ie CFM)

    3) find out if the existing furnace/AC system has the heating/cooling capacity, and if the supply fan has the 'oomph' to make it out there.

    Any comments, suggestions?

    Thanks.

  2. #2
    Join Date
    Jan 2007
    Location
    in my lumpy chair
    Posts
    1,950
    the only advice anyone here can give you is to call a pro. there are to many variables to tell you if the system can handle the new addition.
    if the system is correctly sized for the original home? it would most likly be undersized for the new addition
    I dont warranty Tinkeritus

  3. #3
    Join Date
    Mar 2003
    Location
    PA/DE area
    Posts
    1,535
    I agree with a PRO,system sized for existing home ,ductwork and thermostat location.many people think ductwork is like a garden hose ,you can hack in to it and get water out the end
    It's NOT the BRAND,it's the company that installs it!!!!!

  4. #4
    Join Date
    Apr 2005
    Posts
    104
    ...I wonder how the PROs would approach it.

  5. #5
    Join Date
    Jan 2007
    Location
    in my lumpy chair
    Posts
    1,950
    Quote Originally Posted by the_dude View Post
    ...I wonder how the PROs would approach it.
    with the mannual j,and d calculations
    I dont warranty Tinkeritus

  6. #6
    Join Date
    Feb 2006
    Location
    Tn.
    Posts
    1,344
    Quote Originally Posted by lolson View Post
    the only advice anyone here can give you is to call a pro. there are to many variables to tell you if the system can handle the new addition.
    if the system is correctly sized for the original home? it would most likly be undersized for the new addition
    like lolson said call a heat and cool co. please dont waste your time or money doing it yourself and then it dont work right.

  7. #7
    Join Date
    Mar 2003
    Location
    PA/DE area
    Posts
    1,535
    If you do it your self,rough a wire for a window unit and another for electric baseboard
    It's NOT the BRAND,it's the company that installs it!!!!!

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