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2. Designing the Installation Continued
Installation & Owner’s Guide 4
All heated areas must be protected by a GFCI in either the thermostat or at the service panel. The fuse or circuit
breaker used to protect the circuit supplying power to the Radiant Heat Film system must be rated for a maximum
of 20 amperes (no greater than 16 amp load). If a lower rated fuse or circuit breaker is used, it must be rated
at least 25% greater than the heating system load attached to it. If an area requires more than the 16 amperes
allowed, additional branch circuits may be used, each having its own overcurrent protection. These branch circuits
may all be controlled by a single thermostat if it is used with a system of electric relays or power modules.
Locating the Thermostat
Thermostats are usually located near the power leads. However, they can be located almost anywhere, because
the power leads and the sensor wire can be routed to electrical junction boxes and extended to a location outside
the heated room (such as a utility room or basement). Location of the thermostat should be approximately 60”
(152 cm) above the floor on an inside wall, near the center of the room to allow the connection leads to reach. A
3” deep box is recommended for the thermostat.
Floor Construction
Radiant Heat for Floating Floors can be installed on any standard sub-floor, so long as it is flat, smooth,and free
from protrusions such a nails, screws, etc.
Design Clearances
When designing the heating system, care must be taken to ensure that proper clearance is maintained
from fixtures which may be part of the floor.
• For best results, there should be a 6 inch (15 cm) clearance between the edge of the mats and the perimeter of
the room or the walls. Clearance may be greater than 6 inches.
• Decorative trim: Mats must be installed so that they will not be covered, even in part, by decorative trim,
baseboards or other structures on the floor. Heating mats which are covered by other structures may overheat.
• Wiring: Electrical wiring in the floor, other than that for the heating system, must be at least 2 inches (5 cm)
away from the heating mats and/or separated from the heating mats by insulation or the building structure.
• Heat Sources: At least 8 inches (20 cm) of clearance must be maintained between heat sources and the Radiant
Heat Film mats. Heat sources include hot water pipes, stoves,fireplaces, wood stoves, hot air vents, etc.
The installation of this heating product and
listed components shall be in accordance with
Article 424, of the National Electric Code, ANSI/
NFPA 70. All electrical connections should be
made by a licensed electrician.
The system must be installed using a thermostat
approved by the manufacturer. Use of any
other thermostat will void the manufacturer’s
warranty. For a list of approved thermostat
devices, refer to www Radiant Heat Film. com.
NOTES:
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