PSI Tennessee CMC-C- MECHANICAL - HVAC/REFRIGERATION CONTRACTORPSI Tennessee CMC C MECHANICAL HVAC REFRIGERATION CONTRACTOR References: 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 Residential Load Calcs, reprinted 2016, Eighth Full Edition International Fuel Gas 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. Pipefitters
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