Minnesota Administrative Rules
Agency 151 - Labor and Industry Department
Chapter 1346 - MINNESOTA MECHANICAL AND FUEL GAS CODES
MINNESOTA MECHANICAL CODE
Part 1346.0105 - SECTION 105 WORK EXEMPT FROM PERMIT

1. portable heating, cooking, or clothes drying appliances not connected to a permanent fuel supply, excluding a factory power supply cord;

2. portable ventilation appliances and equipment;

3. portable cooling units;

4. steam, hot water, or chilled water piping within any heating or cooling equipment or appliances regulated by this code;

5. replacement of any minor part that does not alter the approval of equipment or an appliance or make such equipment or appliance unsafe;

6. portable evaporative coolers; and

7. self-contained refrigeration systems that contain 10 pounds (4.5 kg) or less of refrigerant, or that are actuated by motors of 1 horsepower (0.75 kW) or less.