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  1. #1
    Join Date
    Jun 2009
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    1

    Default Second story too cold

    Our second story gets too cold, we've tried closing one or two registers but even closed some cold air still comes through. Any suggestions on getting more cold air at the lower level and less at the second story?

  2. #2
    Join Date
    Jun 2009
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    4

    Default Re: Second story too cold

    Without knowing the DETAILS this general information applies, generally. Cold Air will always SINK - if it can find a way down it will. If it cannot, you should see that it can. This would normally involve enlarging or creating new floor registers. You can do this one spot at a time and monitor the results. Conversely, hot air will always RISE. There is no professional expertise needed to try these solutions, unless you want to homogenize the air circulation by using fans, etc.

  3. #3
    Join Date
    Jun 2009
    Posts
    4

    Default Re: Second story too cold

    In the preceeding thread, when I spoke of REGISTERS, I was referring to simple pass throughs from one floor to another. Not to be confused with the registers of your air condinioning distribution system. A more professional solution would be to replace the ducts on the lower floor with more sizeable ones, and/or reduce the size of the second floor ducts. A more homemade and temporary fix would be to cover over the upstairs registers with cardboard and duct tape.

  4. #4
    Join Date
    Jun 2009
    Location
    Derry, NH
    Posts
    61

    Default Re: Second story too cold

    Quote Originally Posted by janetbunch View Post
    Our second story gets too cold, we've tried closing one or two registers but even closed some cold air still comes through. Any suggestions on getting more cold air at the lower level and less at the second story?
    Close off the returns also.
    AC systems are blind so if you can reduce the air flow and intake to the second floor all the more air will be circulate downstairs to make up the difference.

  5. #5
    Join Date
    Jul 2009
    Location
    Northeast
    Posts
    661

    Default Re: Second story too cold

    Your supply run should have a damper, usually this is found in what is called a takeoff. If you look at the main trunk that comes off of the air handler you should see the runs going to the rooms. The takeoff is on the main trunk and the runs come off of it, there is a damper handle on the takeoff to adjust air flow. Close down the upstairs dampers a little and open the first floor. You my have to do this a couple times to get it right. Good Luck!!

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