International Mechanical Code, 2012 or 2021. Starting 3/12/2026 the 2021 code can be used. As of 6/15/2026 the 2012 code will no longer be allowed.
Manual J - R...
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The course outline of where to tab and highlight the necessary information to pass the HVAC contractor exam is invaluable. The pre printed tabs for book tabbing made reading the tabs and finding the needed information easy.