The State of Michigan has adopted new mechanical, plumbing, and electrical rules and codes effective March 12, 2024.
These include:
To learn more about these new codes, click the links above.
Until the electronic and hard copies are available from the International Code Council (ICC), one can use the 2021 International Mechanical Code with the Part 9A Michigan Amendments for the 2021 Michigan Mechanical Code. The bureau will notify the public when the electronic and hard copy versions of each code are available for purchase and update the code books information on our website, which links to ICC for purchase.
Pre-order your 2021 Michigan Mechanical Codes book here.
MIACCA encourages you to note this important change that has been made to the code:
- R 408.30947b provides for the implementation of ASHRAE 15-2022 within the 2021 Michigan Mechanical Code. ASHRAE 15-2022 defines a clear path for and establishes safety standards associated with the utilization of A2L refrigerants, resulting from an Environmental Protection Agency (EPA) rule issued in late 2021. This EPA rule issued under the American Innovation and Manufacturing Act of 2020 (AIM), mandates an 85% reduction in the production and consumption of hydrofluorocarbon refrigerants by 2036. Although this drawdown is 12 years away, manufacturers have begun significant production and distribution of equipment utilizing A2L refrigerants. This rule supersedes the ASHRAE 15-2019 standard listed in the Referenced Standards section of the 2021 Michigan Mechanical Code.
