The Mechanical Code
The purpose of the mechanical code is to provide adequate requirements considered essential for the safe installation of all mechanical equipment in order to protect the public safety, health and welfare. The code sets forth comprehensive regulations for the safe installation of mechanical facilities where great reliance was previously placed on accepted practice and engineering standards.
What is the mechanical code?
The mechanical code controls the design, installation, maintenance, alteration, and inspection of mechanical systems, including heating systems, ventilating systems, steam and hot water heating systems, process piping, boilers and pressure vessels, appliances utilizing gas, liquid or solid fuel, chimneys and vents, mechanical refrigeration systems, fireplaces, barbecues, incinerators, crematories, fire suppression systems, air pollution control systems, and system utilizing solar or geothermal energy. The 2009 Michigan Mechanical Code went into effect October 21, 2010. Provisions for one- and two-family dwellings are included in the 2009 Michigan Residential Code.
Are mechanical permits required?
Except for replacement of minor parts, mechanical work shall not be started until a permit for such work has been issued by the appropriate enforcing agency.
Permits are not required for portable equipment (heating, ventilation, cooling units, evaporative cooler, gas burners with less than 30,000 Btu/hr), self-contained refrigeration equipment and window-type air conditioners of not more than 1.5 hp, and oil burners not requiring connection to a flue (oil stoves, heaters equipped with wick).
A mechanical permit is not required for the installation of a boiler or pressure vessel if a permit is required by the Boiler Law, Act No. 290, P.A. 1965, as amended. A mechanical permit is required for the installation of a boiler in a private residence or in an apartment building with a capacity of less than six families.
Do you need a license to do mechanical work?
A state mechanical contractor's license is required to secure a mechanical permit except a homeowner may perform a mechanical installation in a single family dwelling which he or she occupies or will occupy.
Permits for steam or vapor boilers carrying a pressure of not more than 15 p.s.i.g., which are located in private residences or in apartment houses of less than 6 families must be secured by a person or business licensed as a boiler installer and mechanical contractor classified in the hydronic heating and cooling, and process piping and HVAC classes.
Mechanical Permit Application
Prior to applying for a mechanical permit, it is suggested the applicant review the statewide jurisdiction list. This information is updated regularly due to changes in the mechanical code enforcement that may be conducted by either the state, county or local unit of government. A mechanical permit application must be submitted to the appropriate enforcing agency.
Questions regarding mechanical permits should be directed to the Mechanical Division at 517-241-9325.
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