Ashrae 90.1 insulation thickness9/24/2023 Testing shall be conducted with a blower door at a pressure of 0.2” w.g. The building or dwelling unit shall be tested and verified as having an air leakage rate of not exceeding 4 air changes per hour. Administrative and other minor amendments can be found in Part 10, Michigan Energy Code and Part 5, Residential Code of the Construction Code.Īmendments include but are not limited to:
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