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Corrections are the most useful thing you can send. If a calculator gives a result you cannot reproduce by hand, if a code table here disagrees with the edition your jurisdiction has adopted, or if a product listing has changed into something other than what the page claims, tell us and we will fix it.

We cannot size a specific installation for you or tell you whether a particular heater suits your house. That is work for the licensed trade that will sign the permit, and getting it wrong on a gas appliance has consequences a website cannot carry.

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