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SunTouch UnderFloor 12" x 5.5' long 120V 0.4A

Item Number: 1200512U2ST


MFR Part No: 81007125

Alternate Part No: 1200512U2ST

SunTouch UnderFloor 1200512U2ST is a safe and efficient radiant electric floor heating system retrofitting an existing cold floor with heat without disturbing the existing floor covering.

Quick Overview

SunTouch UnderFloor 1200512U2ST is a safe and efficient radiant electric floor heating system retrofitting an existing cold floor with heat without disturbing the existing floor covering.


Guaranteed Low Price: $90.00

In stock


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 BoxMat, Detailed Installation Manual.
Warranty from Manufacturer25 Year backed by 140 year old USA Manufacturer
Amp Draw0.4
Wattage : Total watts 55 watts
Heated Area5.5 SF (Sq. Ft. Square Feet)
Size in Inches12" x 66" (12x66 inches)
Size in Feet1' x 5.5' (1x5.5 feet)
Size in Meters0.3m x 1.68m (0.3x1.68 meters)
Installation StyleHeating wire sandwiched between 2 layers of radiant foil. Edge mesh for stapling to joists
Custom Size OptionsNone. Standard Sizes only. No customization possible
Safety ListingUL (Underwriters Laboratory) Listed for U.S. and Canada under UL 1673 and CAN/CSA C22.2 No. 130-03, File No. E185866
ColorOrange Fiberglass Mesh-Blue Heating Wire-White Tape-Silver Power lead
Acceptable Floor CoveringsNatural Stone,Tile, Laminate, Engineered Woods, Carpet, Vinyl, Linoleum, Solid Hardwood
Made In USAMade in USA
Instruction ManualSunTouch 1200512U2ST UnderFloor 12" x 5.5' long 120V 0.4A Installation Manual
Skill Level : D-I-Y Simple for Install, PRO for ElectricInstallation only by qualified persons. Electrician recommended for wiring. Read More
Circuit Breakers and Supply Wire (always follow local code)
Mats or WireSupply WireBreaker
VACtotal amps(AWG*)qtytyperating
120up to 12 amps141single pole15 or 20 A
120up to 15 amps121single pole
20 A
240up to 12 amps141double pole15 or 20 A
240up to 15 amps121double pole20 A

* Recommended only. Follow local codes for wire gauge size.

GFEP / GFCI Protection Required (Ground Fault Circuit Interrupter)Required for each circuit. Built-in to all SunTouch SunStats.
Maximum Circuit Load15 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 wireYes.
Heating Wire constructionETFE Fluoropolymer, metal shield and Radiant Foil
Repairable Heating WireYes, Wire can be repaired. Repair kits and assistance available.
Installation Layout Map customized for my projectYes.
Expected Floor TemperatureThis is dependent on many factors. A well-insulated floor can ensure better performance.
Insulation RecommendedYes, required. See Installation Manual for specifics
Indoor Installation OnlyINTERIOR floor heating Application only. Never embedded in Mortar.
Installation On Sub FloorStapled to sides of Joists.
Distance from Wax Ring at toilet flangeSee manual; 2-8" from most. Do not let foil touch any metal
Minimum Bend RadiusDo Not Bend or remove wire from mat or Foil
Cut WarningNo. Never cut the heating elements or foil to shorten
Minimum Installation Temperature50° Degrees F / 10° Degrees C
Voltage120 VAC
How to choose 120 or 240 VoltSame Energy efficiency & same Watts/SF. More Sq Footage per circuit with 240v
Watts Per SF10 Watts per Sq Foot (approximately)
Heat Output BTUs per SF34 BTU per Sq Ft/Hour
Heating Power : Total BTU's187 BTU total
ManufacturerWatts Radiant
Brand NameSunTouch Floor Warming
Power Lead TypeArmored, NEC color code, Single point connection at 1 corner of mat. No return wire like inferior products
Power Lead Length10 Feet
Power Lead Wire Gauge (varies by heated area)18 AWG
Product Thickness0.125 (less than 1/8")
Heating Wire Spacing2.5" inches
Ohms Reading (resistance value)247-302 ohms
ZERO* EMF (Electro Magnetic Field)Yes. Verified by Independent Testing Laboratory as ultra low. REET test
Controls/Thermostat is required for operationSunStat Floor sensing thermostat
Conduit required for Power LeadsConduit does make installation easier in new construction
PackagingEasy Open Cardboard - no frustration
Width of heating area Feet1' ft. feet
Length of heating area Feet5.5' ft. feet
Width of heating area Inches12" in. inch
Length of heating area Inches66" in. inch
Width of heating area Meters0.3m meter metre
Length of heating area Meters1.68m meter metre

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