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Installation & Owner’s Guide QW-JOIST 2
Control Device Options
The fuse or circuit breaker used must be rated for a maximum of 20 amperes (no greater than 15 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 15 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.
The selection of a control device will be determined by the designed use of the system. If installed and used as a
primary heating system, a thermostat must be used. If designed to be used as a supplemental or floor warming
system, timers or other control devices also may be used. Whichever control option is used, all components must
meet all applicable local and national codes and be rated for use with an electrical heating system.
Floor Construction
Joists: The QuietWarmth System is designed for use with typical wood and/or metal floor joists. The joists must
have a facing width no greater than 2 inches / 50 mm with a spacing between the joists strips of 16 inches on
center / 400mm. *Currently only 16” on Center Panels are available.
Floor Surface: The floor surface may be of any material having a total thermal insulation value of less than R-11 /
RSI-2 — this includes any floor finish such as tile, hardwood, carpet, as well as secondary materials added to the
floor at a later time. Contact the material manufacturer for specific information concerning the thermal insulation
factor of the material being specified.
Surface Finish: Any type of surface finish can be applied to the finished floor — the total thermal insulation value
of the sub-floor and floor finish must not exceed R-11.
CAUTION:
All wiring, fuses and/or circuit
breakers must conform to
National Electrical Code.
Metal joists must be properly
grounded in accordance with
local codes.
NOTE:
The National Electrical Code specifies that each branch circuit used
in conjunction with a heating system must be for the exclusive use of
the heating system. Do not connect lights, outlets, etc. to any branch
circuit used with the QuietWarmth System.
NOTE:
Do not use the System to cure adhesives, stains or paints since direct
heat during curing may cause cracks or discoloration.
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