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SECTION 1. Design Criteria
The QuietWarmth System is made up of 4 major components: the heating panels, the wiring, the control device
and the building structure. These components work together to create a system that will provide comfortable,
trouble-free heat. The selection and installation of each component is very important to the system’s overall safe
operation.
Designing a QuietWarmth System is straightforward — the following instructions must be complied with to
ensure a trouble-free design and to comply with the warranty requirements.
Heat Loss Calculation
If the Warm Floors System is to be used as a primary heating system for a room, a heat loss calculation must be
completed to determine the energy required to adequately heat the space under foreseeable circumstances. The
Air Conditioning Contractors of America (ACCA) Manual J includes worksheets for manually calculating the heat
loss of a structure. Other, comparable, heat loss methods and/or documents may be used. Make sure that all
sources of heat loss (transmission, infiltration and radiant) are taken into account.
Most bathrooms and some kitchens have small available floor areas relative to the volumes of the rooms, the
maximum possible amount of installed heat is often insufficient to supply the demand. Bathrooms and other areas
where there is not enough available floor space to allow installation of sufficient QuietWarmth heating panels to
act as a sole source of primary heat must use a supplementary or alternative heat source, such as high power
radiant panels, baseboard heaters, etc.
Installation & Owner’s Guide QW-JOIST 1
NOTE:
A Planning Guide is available to assist installation layout
of the mats. See back of this manual for more.
NOTE:
Some heat loss methods, particularly those designed for
gas and oil based systems, provide their answers in Btus
per hour. To convert Btus per hour to watts, multiply each
area total by 0.293 (or divide by 3.41).
Always include a recovery factor of at least 20% more
than the mini-mum calculated heat requirement to cover
unforeseen circumstances.
CAUTION:
A separate heat loss calculation must be
done for each enclosed area (room, etc.). A
separate control device must be included
for each enclosed area.
Do not install as a primary heating sys-
tem in any bathroom, room or other area
which does not have at least as much heat
installed as is called for by the heat loss
calculation, plus the recovery factor.
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