SunTouch UnderFloor allows you to retro-fit almost any type of floor with electric radiant heat without having to replace the existing floor covering.
UnderFloor is good for interior use only. It installs under existing wood subfloors that are accessible from underneath via crawlspace, basement or garage ceiling. The system is mainly for application in residential or light commercial areas. UnderFloor can be installed in any areas that require floor warming. The floor is heated directly by the mat installed under it.
If you need help selecting the right mat option for the room/area you want to use UnderFloor for please give us a call at (888) 594-7322 or email us your questions. We will be glad to help you get exactly what you need!
- Product Details
UnderFloor = Zero EMF
An emerging issue in the electric radiant heat industry is EMF (electromagnetic field) radiation. SunTouch pioneered and sells only ZERO EMF products constructed with active dual wire EMF-canceling technology.
All SunTouch products use a complex wire construction with two heating elements in parallel with an added and patented helical twist to eliminate EMF. Other electric radiant floor heating companies sell single-wire systems that release high levels of EMF when compared to SunTouch.
What is EMF? Electromagnetic fields (EMF) come from all electrical appliances, but studies show an average American's daily exposure is less than 1 unit (mG) of EMF. But. when you sit on an unshielded electric radiant floor, you may be exposed to 20, 40, or more times the average daily exposure. This Data comes from Independent testing. Read More Here
Is limiting exposure to EMF important? No one is certain. The World Health Organization says the data is inconclusive to date, but continues their research. We provide this EMF information because it is important to some people, not to frighten you or exaggerate any risk.
For many years customers have chosen SunTouch Zero EMF systems, but we leave the choice to you after explaining what we do know.
What's In The Box Mat, Detailed Installation Manual. Warranty from Manufacturer 25 Year backed by 140 year old USA Manufacturer Amp Draw 0.9 Wattage : Total watts 105 watts Heated Area 10.5 SF (Sq. Ft. Square Feet) Size in Inches 12" x 126" (12x126 inches) Size in Feet 1' x 10.5' (1x10.5 feet) Size in Meters 0.3m x 3.2m (0.3x3.2 meters) Installation Style Heating wire sandwiched between 2 layers of radiant foil. Edge mesh for stapling to joists Custom Size Options None. Standard Sizes only. No customization possible Safety Listing UL (Underwriters Laboratory) Listed for U.S. and Canada under UL 1673 and CAN/CSA C22.2 No. 130-03, File No. E185866 Color None Made In USA Made in USA
- How to Install
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.
Staple other side to opposite joist. Each mat must fit within a single joist bay.
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.
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.
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.
UnderFloor Installation Video Instruction Manual SunTouch 1201012U2ST UnderFloor 12" x 10.5' long 120V 0.9A Installation Manual Skill Level : D-I-Y Simple for Install, PRO for Electric Installation only by qualified persons. Electrician recommended for wiring. Read More Circuit Breakers and Supply Wire (always follow local code) Mats or Wire Supply Wire Breaker VAC total amps (AWG*) qty type rating 120 up to 12 amps 14 1 single pole 15 or 20 A 120 up to 15 amps 12 1 single pole 20 A 240 up to 12 amps 14 1 double pole 15 or 20 A 240 up to 15 amps 12 1 double pole 20 A
* Recommended only. Follow local codes for wire gauge size.
GFEP / GFCI Protection Required (Ground Fault Circuit Interrupter) Required for each circuit - INCLUDED in SunStat Control Maximum Circuit Load 15 Amps Maximum Circuit Overload Protection 20 A Breaker. Electrical Box Size (Where Mats connect to Thermostat) Extra-deep single-gang box for 1 or 2 leads, Or 4" square deep box for 3 cables (extra room needed for Wire, wire nuts, control) Heating Elements (Dual Wire) Oxygen-free copper or nickel-copper Full Length End-to-End ground wire Yes. Heating Wire construction ETFE Fluoropolymer, metal shield and Radiant Foil Repairable Heating Wire Yes, Wire can be repaired. Repair kits and assistance available. Installation Layout Map customized for my project Yes. Expected Floor Temperature Dependent on Many factors, insulation recommended. Insulation Recommended Yes, required. See Installation Manual for specifics Indoor Installation Only INTERIOR floor heating Application only. Never embedded in Mortar. Installation On Sub Floor Stapled to sides of Joists. Distance from Wax Ring at toilet flange See manual; 2-8" from most. Do not let foil touch any metal Minimum Bend Radius Do Not Bend or remove wire from mat or Foil Cut Warning No. Never cut the heating elements or foil to shorten Minimum Installation Temperature 50° Degrees F / 10° Degrees C
Voltage 120 VAC How to choose 120 or 240 Volt Same Energy efficiency & same Watts/SF. More Sq Footage per circuit with 240v Watts Per SF 10 Watts per Sq Foot (approximately) Heat Output BTUs per SF 34 BTU per Sq Ft/Hour Heating Power : Total BTU's 357 BTU total Manufacturer Watts Radiant Brand Name SunTouch Floor Warming Power Lead Type Armored, NEC color code, Single point connection at 1 corner of mat. No return wire like inferior products Power Lead Length 10 Feet Power Lead Wire Gauge (varies by heated area) 18 AWG Product Thickness 0.125 (less than 1/8") Heating Wire Spacing 2.5" inches Weight 4.0000 Ohms Reading (resistance value) 121-148 ohms ZERO* EMF (Electro Magnetic Field) Yes. Verified by Independent Testing Laboratory as ultra low. REET test Controls/Thermostat is required for operation SunStat Floor sensing thermostat Conduit required for Power Leads Conduit does make installation easier in new construction Packaging Easy Open Cardboard - no frustration Width of heating area Feet 1' ft. feet Length of heating area Feet 10.5' ft. feet Width of heating area Inches 12" in. inch Length of heating area Inches 126" in. inch Width of heating area Meters 0.3m meter metre Length of heating area Meters 3.2m meter metre
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