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WarmWire 200 Sq Ft 240V Radiant Floor Heating Cable

Item Number: 240200WD

Manufacturer: Watts Radiant


Alternate Part No: DISCONTINUED

WarmWire is an affordable solution for floor warming in kitchens, bathrooms, entry ways and any other indoor areas where you need warm floors.

Quick Overview

WarmWire is an affordable solution for floor warming in kitchens, bathrooms, entry ways and any other indoor areas where you need warm floors.


Guaranteed Low Price: $810.00

Out of Stock


WarmWire cables are very close to SunTouch mats in construction and provide the same cozy heat for your floors, but cost less and install differently.

To install WarmWire you need to:

  • Place and attach the WarmWire strap to the subfloor;
  • Weave the wire back and forth between straps to create your own heated area (while doing that space the wires depending on your warming needs.)
  • Cover with thin-set or self-leveling mortar. You can then use almost any floor covering with WarmWire (tile, stone, wood, laminate, carpet)

Why WarmWire is so Great?

  • Easy to install in rooms of any size or shape;
  • Safe good for installation in showers;
  • Ultra-low EMF with Active Shielding & Twin-wire technology;
  • Durable 3-layer protection with a 25 year warranty
  • Flexible easy installation for curves and angles
  • Available in 120VAC and 240VAC
  • Armored 3-wire power lead - no return wire from the end 1 Connection
  • Long life with oxygen-free copper heating elements
  • High Performance ETFE insulation
  • Protected by woven stainless steel braid
  • Strengthened with polyurethane outer jacket for ultimate impact & cut resistance
  • Safe grounded from end to end and UL listed in USA & Canada

If you have any questions or need help selecting the right WarmWire cable length for your project feel free to call us at (866) 558 3369 or email us We will be happy to help you get exactly what you need!

Product Details

WarmWire = 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 BoxWarmWire Spool in Easy to dispense box. Detailed Installation Manual. Installation video online.
Warranty from Manufacturer25 year warranty backed by USA Manufacturer since 1873
Heated Area Size Covered200.00
Amp Draw10.00
Cable length in inches11280" in. inch
Cable length in feet940' ft. feet
Cable length in meters284.85 m meter metre
Wattage : Total watts 2400 watts
Installation StyleHeating Cable secured to floor using Metal Cable Strap (track). Strap secured to floor with tape,screws or glue
Custom Size OptionsNone. Standard lengths only. No customization
Safety ListingUL (Underwriters Laboratory) Listed for U.S. and Canada under UL 1673 and CAN/CSA C22.2 No. 130-03, File No. E185866
ColorClear flexible Polyurethane Coating Jacket over Stainless Steel braid
Cable strap or guides5 recommended (1 for every 40 - 50 sq ft)
Acceptable Floor CoveringsNatural Stone,Tile, Laminate, Engineered Woods, Carpet, Vinyl, Linoleum, Solid Hardwood (if you use sleepers)
Made In USAMade in USA
Instruction ManualWarmWire 240200WD 200 Sq Ft 240V Radiant Floor Heating Cable Installation Manual
Skill Level : D-I-Y Simple for Install, PRO for ElectricRunning Cable more difficult + more time than MATS. Installation only by qualified persons. Electrician recommended for wiring. Read More
GFEP / GFCI Protection Required (Ground Fault Circuit Interrupter)Required for each circuit. Built-in to all SunTouch SunStats.
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.

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)
Full Length End-to-End ground wireYes.
Heating Wire constructionETFE Fluoropolymer, Stainless Steel Ground Braid shield and Outside layer of Clear Polyurethane
Heating Elements (Dual Wire)Oxygen-free copper or nickel-copper
Repairable Heating WireYes, Wire can be repaired. Repair kits and assistance available.
Shower Installation PermittedYes, can be installed in a tiled shower. UL listed, verify local code.
Installation Layout Map customized for my projectNo - example in manual. We provide Layout Maps only for MATS
Expected Floor TemperatureThis is dependent on many factors. A well-insulated floor can ensure better performance.
Insulation RecommendedYes; under slabs or framed floors. Cork or similar on top of Concrete Subfloor as thermal break
Indoor Installation OnlyINTERIOR floor heating application only. Embedded in mortar or self leveler only
Installation On Sub Flooron TOP of Sub Floor (Plywood, backer board, concrete)
Distance from Wax Ring at toilet flangeInstall 4 - 6 inches away; can be under front of toilet. Approx 20" from wall
Trowel Size recommendedMinimum 3/8" x 1/4". Dependent on tile size - verify with tile/mortar manufacturer
Trowel type RecommendedHeavy Duty Plastic PRO-Trowel
Cut WarningNever cut the heating elements to shorten
Minimum Installation Temperature50° Degrees F / 10° Degrees C
Voltage240 VAC
How to choose 120 or 240 VoltSame Energy efficiency & same Watts/SF. More Sq Footage per circuit with 240v
Watts Per SF12 Watts per Sq Foot @ 2.5" in. inch spacing
Heat Output BTUs per SF41 BTU per Sq Ft/Hour @ 2.5" in. inch spacing
Heating Power : Total BTU's8200 BTU total
ManufacturerWatts Radiant
Brand NameSunTouch Warm Wire
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)14 AWG
PackagingEasy Open Cardboard - no frustration. Easy to dispense wire from box
Product Thickness1/8" - 3/16" (nominal) Shorter cables are thinner.
Heating Wire Spacing2" - 2.5" - 3" on center
Minimum Bend Radius1/2" 0.50 inch
Ohms Reading (resistance value)20-26 ohms
ZERO* EMF (Electro Magnetic Field)Yes. Verified by Independent Testing Laboratory as ultra low.
Controls/Thermostat is required for operationSunStat Floor sensing thermostat
Conduit required for Power LeadsConduit is not required for Power Leads
Width of heating area FeetVariable - you determine layout width, length, shape
Spacing between runs (inches) Heated SF Watts Per SF BTUs/SF/Hr
2 160 15 51
2.5 200 12 41
3 240 10 34

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