Page 529 - 2018_IRC

HEATING AND COOLING EQUIPMENT AND APPLIANCES

SECTION M1406 M1407.3 Installation with heat pumps and air condition-
RADIANT HEATING SYSTEMS ers. Duct heaters located within 4 feet (1219 mm) of a heat
M1406.1 General. Electric radiant heating systems shall be pump or air conditioner shall be listed and labeled for such
installed in accordance with the manufacturer’s instructions installations. The heat pump or air conditioner shall addition-
and Chapters 34 through 43 and shall be listed for the appli- ally be listed and labeled for such duct heater installations.
cation. M1407.4 Access. Duct heaters shall be located to allow
M1406.2 Clearances. Clearances for radiant heating panels access for servicing, and clearance shall be maintained to per-
or elements to any wiring, outlet boxes and junction boxes mit adjustment, servicing and replacement of controls and
used for installing electrical devices or mounting luminaires heating elements.
shall comply with Chapters 34 through 43. M1407.5 Fan interlock. The fan circuit shall be provided
with an interlock to prevent heater operation when the fan is
M1406.3 Installation of radiant panels. Radiant panels not operating.
installed on wood framing shall conform to the following
requirements:
1. Heating panels shall be installed parallel to framing SECTION M1408
members and secured to the surface of framing mem- VENTED FLOOR FURNACES
bers or mounted between framing members. M1408.1 General. Oil-fired vented floor furnaces shall com-
2. Mechanical fasteners shall penetrate only the unheated ply with UL 729 and shall be installed in accordance with
portions provided for this purpose. Panels shall not be their listing, the manufacturer’s instructions and the require-
1
fastened at any point closer than / inch (6.4 mm) to an ments of this code.
4
element. Other methods of attachment of the panels M1408.2 Clearances. Vented floor furnaces shall be
shall be in accordance with the panel manufacturer’s installed in accordance with their listing and the manufac-
instructions. turer’s instructions.
3. Unless listed and labeled for field cutting, heating pan- M1408.3 Location. Location of floor furnaces shall conform
els shall be installed as complete units. to the following requirements:
M1406.4 Installation in concrete or masonry. Radiant 1. Floor registers of floor furnaces shall be installed not
heating systems installed in concrete or masonry shall con- less than 6 inches (152 mm) from a wall.
form to the following requirements:
2. Wall registers of floor furnaces shall be installed not
1. Radiant heating systems shall be identified as being less than 6 inches (152 mm) from the adjoining wall at
suitable for the installation, and shall be secured in inside corners.
place as specified in the manufacturer’s installation
instructions. 3. The furnace register shall be located not less than 12
inches (305 mm) from doors in any position, draperies
2. Radiant heating panels or radiant heating panel sets or similar combustible objects.
shall not be installed where they bridge expansion
joints unless protected from expansion and contraction. 4. The furnace register shall be located not less than 5 feet
(1524 mm) below any projecting combustible materi-
M1406.5 Finish surfaces. Finish materials installed over als.
radiant heating panels or systems shall be installed in accor-
dance with the manufacturer’s instructions. Surfaces shall be 5. The floor furnace burner assembly shall not project into
secured so that nails or other fastenings do not pierce the radi- an occupied under-floor area.
ant heating elements. 6. The floor furnace shall not be installed in concrete floor
construction built on grade.
7. The floor furnace shall not be installed where a door can
SECTION M1407 swing within 12 inches (305 mm) of the grille opening.
DUCT HEATERS
M1408.4 Access. An opening in the foundation not less than
M1407.1 General. Electric duct heaters shall be installed in 18 inches by 24 inches (457 mm by 610 mm), or a trap door
accordance with the manufacturer’s instructions and Chapters not less than 22 inches by 30 inches (559 mm by 762 mm)
34 through 43. Electric duct heaters shall comply with UL shall be provided for access to a floor furnace. The opening
1996. and passageway shall be large enough to allow replacement
M1407.2 Installation. Electric duct heaters shall be installed of any part of the equipment.
so that they will not create a fire hazard. Class 1 ducts, duct M1408.5 Installation. Floor furnace installations shall con-
coverings and linings shall be interrupted at each heater to form to the following requirements:
provide the clearances specified in the manufacturer’s instal-
lation instructions. Such interruptions are not required for 1. Thermostats controlling floor furnaces shall be located
duct heaters listed and labeled for zero clearance to combusti- in the room in which the register of the floor furnace is
ble materials. Insulation installed in the immediate area of located.
each heater shall be classified for the maximum temperature 2. Floor furnaces shall be supported independently of the
produced on the duct surface. furnace floor register.

504 2018 INTERNATIONAL RESIDENTIAL CODE ®
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