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All the Perl that's Practical to Extract and Report

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  • by clintp (2) on 2002.06.10 18:12 (#9428)
    Assuming this is a standard centralized air system(single-point forced air), go to where the air ducts all meet at the heat exchange unit (where the blower will be). Each of the 6" or 8" galvanized ducts may have a valve.

    From the outside it'll look like a bolt just screwed onto the duct with a metal lever on it. (On the inside, it's a butterfly valve). If installed correctly, the lever pointing the same direction as the duct is "open" and purpendicular is "closed".

    In the summertime, close the vents that lead to the basement (if there are any), and to the main floor rooms that may get too cold. Open the vents wide to the upstairs and the hot main floor rooms. The cold air from upstairs will gradually sink to the lower floors. When you get really good at this, you can have the whole house cooled evenly.

    In the wintertime, reverse the valves. :)