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// CODE SNIPPET

Section M1407 Duct Heaters

2015 Michigan Residential Code > 14 Heating and Cooling Equipment and Appliances > M1407 Duct Heaters
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M1407.1 General

Electric duct heaters shall be installed in accordance with the manufacturer's instructions and Chapters 34 through 43 of this code. Electric duct heaters shall comply with UL 1996.

M1407.2 Installation

Electric duct heaters shall be installed so that they will not create a fire hazard. Class 1 ducts, duct coverings and linings shall be interrupted at each heater to provide the clearances specified in the manufacturer's installation instructions. Such interruptions are not required for duct heaters listed and labeled for zero clearance to combustible materials. Insulation installed in the immediate area of each heater shall be classified for the maximum temperature produced on the duct surface.

M1407.3 Installation With Heat Pumps and Air Conditioners

Duct heaters located within 4 feet (1219 mm) of a heat pump or air conditioner shall be listed and labeled for such installations. The heat pump or air conditioner shall additionally be listed and labeled for such duct heater installations.

M1407.4 Access

Duct heaters shall be accessible for servicing, and clearance shall be maintained to permit adjustment, servicing and replacement of controls and heating elements.

M1407.5 Fan Interlock

The fan circuit shall be provided with an interlock to prevent heater operation when the fan is not operating.

Related Code Sections


Section M1407 Heating and Cooling Equipment and Appliances, Duct Heaters
Electric duct heaters shall be installed in accordance with the manufacturer's instructions and Chapters 34 through 43 of this code. Electric duct ...
2015 Michigan Residential Code > 14 Heating and Cooling Equipment and Appliances > M1407 Duct Heaters
604.8 Duct Systems, Lining Installation
) downstream of electric-resistance and fuel-burning heaters in a duct system. Metal nosings or sleeves shall be installed over exposed duct liner edges ...
2015 Michigan Mechanical Code > 6 Duct Systems > 604 Insulation > 604.8 Lining Installation
G2444.3 Fuel Gas, (620.3) Ductwork
Ducts shall not be connected to a unit heater unless the heater is listed for such installation ...
2015 Michigan Residential Code > 24 Fuel Gas > G2444 (620) Unit Heaters > G2444.3 (620.3) Ductwork
920.3 Specific Appliances, Fireplaces and Solid Fuel-Burning Equipment, Ductwork
A unit heater shall not be attached to a warm-air duct system unless listed for such installation ...
2015 Michigan Mechanical Code > 9 Specific Appliances, Fireplaces and Solid Fuel-Burning Equipment > 920 Unit Heaters > 920.3 Ductwork
Section 920 Specific Appliances, Fireplaces and Solid Fuel-Burning Equipment, Unit Heaters
A unit heater shall not be attached to a warm-air duct system unless listed for such installation ...
2015 Michigan Mechanical Code > 9 Specific Appliances, Fireplaces and Solid Fuel-Burning Equipment > 920 Unit Heaters
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