- Mechanical systems within 1- and 2-family dwellings shall be constructed and maintained in accordance with the Michigan residential code for 1- and 2-family dwellings.
- Mechanical systems in existing buildings undergoing repair, alterations, or additions, and change of occupancy shall be permitted to comply with the Michigan rehabilitation code for existing buildings.
The inspection for maintenance of HVAC systems shall be performed in accordance with ASHRAE/ACCA/ANSI Standard 180.
Minor additions, alterations, renovations and repairs to existing mechanical systems shall meet the provisions for new construction, unless such work is done in the same manner and arrangement as was in the existing system, is not hazardous and is approved.
Where the code official has first obtained a proper inspection warrant or other remedy provided by law to secure entry, an owner, the owner's authorized agent or occupant or person having charge, care or control of the building or premises shall not fail or neglect, after proper request is made as herein provided, to promptly permit entry therein by the code official for the purpose of inspection and examination pursuant to this code.
- A portable heating or gas appliance that has inputs of less than 30,000 Btu's per hour.
- Portable ventilation appliances and equipment.
- A portable cooling unit.
- Steam, hot water, or chilled water piping within any heating or cooling equipment or appliances regulated by the code.
- The replacement of any minor part that does not alter the approval of equipment or an appliance or make such equipment or appliance unsafe.
- A portable evaporative cooler.
- Self-contained refrigeration systems that contain 10 pounds or less of refrigerant, or that are actuated by motors of 1 horsepower or less.
- Portable fuel cell appliances that are not connected to a fixed piping system and are not interconnected to a power grid.
- An oil burner that does not require connection to a flue, such as an oil stove and a heater equipped with a wick.
- A portable gas burner that has inputs of less than 30,000 Btu's per hour.
- When changing or relocating a gas meter or regulator, a permit is not required when installing gas piping which shall be limited to 10 feet in length and not more than 6 fittings.
- When installing geothermal vertical closed loops
under the supervision of a mechanical contractor
licensed in HV AC as long as the company meets both
- Has obtained a certificate of registration as a well drilling contractor pursuant to part 127 of the public health code.
- Has installed the geothermal vertical closed loops in accordance with the department of environmental quality's best practices regarding geothermal heat pump closed loops
- Construction documents, engineering calculations, diagrams, and other data shall be submitted in 2 or more sets with each application for a permit. The code official shall require construction documents, computations, and specifications to be prepared and designed by a registered design professional in accordance with 1980 PA 299, MCL 339.101 to 339.2919. Exceptions:
- The code official may waive the submission of construction documents, calculations, or other data if the nature of the work applied for is such that reviewing of construction documents is not necessary to determine compliance with the code.
- Construction documents shall not be required
when obtaining a permit from the State of Michigan,
bureau of construction codes for any of the
- One-and 2-family dwellings when the heating or cooling input rating is 375,000 Btu's or less.
- Alterations and repair work determined by the mechanical official to be of a minor nature.
- Business, mercantile, and storage buildings having HV AC equipment only, with 1 fire area and not more than 3,500 square feet.
- Work completed by a governmental sub-division or state agency costing less than $15,000.00.
- Where special conditions exist, the code official may require additional construction documents to be prepared by a registered design professional.
- Construction documents shall be drawn to scale and shall be of sufficient clarity to indicate the location, nature, and extent of the work proposed and show in detail that the work conforms to the provisions of this code.
- Construction documents for buildings more than 2 stories in height shall indicate where penetrations will be made for mechanical systems, and the materials and methods for maintaining required structural safety, fire-resistance rating, and fire blocking.
The code official shall have the authority to issue a permit for the construction of part of a mechanical system before the construction documents for the entire system have been submitted or approved, provided adequate information and detailed statements have been filed complying with all pertinent requirements of this code. The holder of such permit shall proceed at his or her own risk without assurance that the permit for the entire mechanical system will be granted.
The issuance of a permit based upon construction documents and other data shall not prevent the code official from thereafter requiring the correction of errors in said construction documents and other data or from preventing building operations from being carried on there under where in violation of this code or of other ordinances of this jurisdiction.
- Underground inspection shall be made after trenches or ditches are excavated and bedded, piping installed, and before backfill is put in place. Where excavated soil contains rocks, broken concrete, frozen chunks and other rubble that would damage or break the piping or cause corrosive action, clean backfill shall be on the job site.
- Rough-in inspection shall be made after the roof, framing, fireblocking and bracing are in place and all ducting and other components to be concealed are complete, and prior to the installation of wall or ceiling membranes.
- Final inspection shall be made upon completion of the mechanical system.
Where such mechanical system is to be disconnected, written notice as prescribed in Section 108.2 shall be given. In cases of immediate danger to life or property, such disconnection shall be made immediately without such notice.
Where a mechanical system is maintained in violation of this code, and in violation of a notice issued pursuant to the provisions of this section, the code official shall institute appropriate action to prevent, restrain, correct or abate the violation.