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Home > UnderFloor Retro-fit Mats
UnderFloor™ Heat for Existing Floors
Warm existing floors without replacing the floor coverings!
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SunTouch® UnderFloor™ radiant heating mats are the perfect solution to provide retro fit heat for most
floors. These specially
designed radiant heating panels are easy to install and warm existing floors from underneath the existing sub floor and
flooring material. |
UnderFloor mats are Safe and UL Listed to provide 10 Watts per Sq Ft (34 BTUs/SF). How much heat reaches your floor
surface depends on the flooring and R-Value of
the sub floor and flooring.
A typical 3/4 inch thick wood subfloor has an R-Value of only 0.9, so UnderFloor is very effective for most floors:
- Expect up to 15º F more warmth on most floors of Tile, Wood, Stone or Laminate;
- For Carpet, expect 6-10º F more warmth. The thickest carpet and pad allows less heat.
Easy Installation
Our Under Floor Heating mats are “do-it-yourself” friendly or can be installed by a handyman or
contractor. If you have access under a floor simply
staple UnderFloor heating mats to the floor joists and connect the factory installed 10 ft power leads directly to the
thermostat or junction boxes. Don’t forget to
insulate under the mats as it is essential to performance.
Each UnderFloor heating mat is designed to be installed in only one joist bay. The heating mats cannot be cut shorter to
fit a shorter joist bay or modified in any
way to cross into another area. More than one mat may be installed in a joist bay where there are barriers just don’t let
the mats touch or overlap.
Premium UnderFloor Radiant Heat
SunTouch UnderFloor is true radiant heating and has 2 layers of Radiant Foil (that’s
the blue you see in the above image). These 2
layers of Radiant Foil greatly improve performance and spread the heat safely and evenly from the SunTouch heating wire
inside.
Available in 2 widths to fit 12 or 16 inch joist spacing (center to center, not between edges) to fit nearly all North
American Homes.
UnderFloor comes out of the box ready to install. Our power leads are
assembled, connected and installed at our Factory
for
your safety and Long Life. Inferior products require connection of the power lead by hand at the job site. SunTouch
insists on a UL Factory connection by trained
technicians to ensure safety and performance.
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Installation Video
Installation Steps
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Step 1 Unroll mat and staple 1 side to side of first joist so foil will be 2”
from Sub floor above and hangs down like a
curtain. |
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Step 2
Staple other side to opposite joist. Each mat must fit within a single joist bay. |
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Step 3
Mount Electrical boxes and connect mats in parallel to power in junction boxes. Follow applicable building and
electrical codes, using conduit to electrical boxes
as required. 15 amps maximum per thermostat. If you have only a few mats, the power leads may reach the thermostat without
a Junction Box. |
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Step 4
Connect the SunStat thermostat and test the system. Then install fiberglass insulation batts (R-11 to R-19) up to the
mats. Insulation must be installed at the ends
of the joist bays vertically or 6 inches after the mat ends. |
Kitchen Layout Example Using UnderFloor Mats
Each electric UnderFloor heating mat is designed to be installed in a single joist bay. The heating
mats cannot be cut shorter to fit a shorter
joist bay or altered in any way. Do not try to fill multiple joist bays with 1 mat. However, multiple mats may be
installed in a joist bay where there are
obstructions (such as cross bracing) as long as they do not overlap or touch.
In this layout, four 9.5'x16" and eight 4'x16" mats are required to warm the floor area.
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The heat mats are wired together in parallel (not in series) in junction
boxes below the floor, then an electric wire is fed over to the SunStat control.
Mat lengths should be selected so they fit completely within each bay and allow for the easiest wiring. When all the
power leads start on one side, it will be easy
to wire them together in the junction boxes. Code requires junction boxes to remain accessible at conclusion of the
job.
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"I received and installed the new thermostat to replace our 6 year old model. Works like a charm now!! Thanks so much for the warm floors and the great customer service."
- Anonymous
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