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Old 11-11-2008, 01:14 PM
Jim Luttrall Jim Luttrall is offline
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Join Date: Mar 2007
Location: Allen, Texas
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Re: Ventilation requirements for natural gas water heater
http://www.americanwaterheater.com/s...flameguard.pdf
Take a look at these installation instructions. Your brand may vary and you should look at those, but this will give a few ideas of the options for venting and the requirements for sizing.
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