TempZone™ Floor Heating Cable 120V, (3.7W/ft.), 30 ft., 1.0A

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Based on 220 reviews
Need help? Call our experts at 800-875-5285
How Much Cable Will I Need?
How Much Cable Will I Need?
Coverage (sq. ft.) Based on Cable Spacing
Length Voltage 3" 3.5" 3.75" 4" 5"
30′ 120 7.5 8.8 9.4 10 12.5
40′ 120 10 11.7 12.5 13.3 16.7
50′ 120 12.5 14.6 15.6 16.7 20.8
55′ 240 13.8 16 17.2 18.3 22.9
65′ 240 16.3 19 20.3 21.7 27.1
70′ 120 17.5 20.4 21.9 23.3 29.2
75′ 240 18.8 21.9 23.4 25 31.3
90′ 120 22.5 26.3 28.1 30 37.5
95′ 240 23.8 27.7 29.7 31.7 39.6
115′ 240 28.8 33.5 35.9 38.3 47.9
120′ 120 30 35 37.5 40 50
150′ 120 37.5 43.8 46.9 50 62.5
155′ 240 38.8 45.2 48.4 51.7 64.6
180′ 120 45 52.5 56.3 60 75
195′ 240 48.8 56.9 60.9 65 81.3
220′ 120 55 64.2 68.8 73.3 91.7
235′ 240 58.8 68.5 73.4 78.3 97.9
260′ 120 65 75.8 81.3 86.7 108.3
275′ 240 68.8 80.2 85.9 91.7 114.6
300′ 120 75 87.5 93.8 100 125
315′ 240 78.8 91.9 98.4 105 131.3
340′ 120 85 99.2 106.3 113.3 141.7
355′ 240 88.8 103.5 110.9 118.3 147.9
375′ 120 93.8 109.4 117.2 125 156.3
395′ 240 98.8 115.2 123.4 131.7 164.6
432′ 120 108 126 135 144 180
435′ 240 108.8 126.9 135.9 145 181.3
515′ 240 128.8 150.2 160.9 171.7 214.6
595′ 240 148.8 173.5 185.9 198.3 247.9
675′ 240 168.8 196.9 210.9 225 281.3
749′ 240 187.3 218.5 234.1 249.7 312.1
864′ 240 216 252 270 288 360

The amount of cable you'll need depends on the heat output and amount of heating coverage you want, both of which are impacted by the spacing of the heating cable. The spacing of the heating elements is dictated by how the cable is installed and WarmlyYours offers two different installation methods: with Fixing Strips or with our Prodeso Membrane.

Fixing Strips

An economical option, requires more work than the membrane.

Ideal spacing for installing TempZone 3.7-watt Cable:

  • 3" (14.8-watts per sq. ft.)

Other spacing options:

  • 4" (11.1-watts per sq. ft.)
  • 5" (8.88-watts per sq. ft.)
Prodeso Membrane

Costlier than strips, speeds up installation and provides uncoupling benefits

Ideal spacing for installing TempZone 3.7-watt Cable:

  • 3.75" (11.84-watts per sq. ft.)

Other spacing options:

  • 5" (8.88-watts per sq. ft.)

You can use our quote tool to get a rough estimate of the amount of cable you'll need for a project.

Get Started

Or contact us for help:

You can also submit a drawing of your project (with dimensions) and we'll provide you with a free installation plan with the exact amount of cable you'll need. Get started

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Quebec Repairability Notice

Features

  • 25 Year Warranty
  • 9-15 Watts Per Sq. Ft
  • Loose cable offers the freedom and flexibility to fit any room shape

Notices

Quebec Repairability Notice

Avis important pour les consommateurs du Québec:

WarmlyYours n’offre pas de services de réparation pour ce produit. Les seules pièces de rechange disponibles sont les kits de raccordement (splice kits) ; l’élément chauffant lui-même n’est pas offert comme pièce de rechange. Si votre système de chauffage par le sol intérieur tombe en panne pendant la période de garantie, nous remplacerons l’unité complète conformément à notre politique de garantie. Notre équipe d’assistance technique est disponible 24h/24 et 7j/7 par téléphone pour toute aide à l’installation ou au dépannage. Pour plus de détails, consultez notre politique de retour. Cet avis est fourni conformément à la Loi sur la protection du consommateur du Québec, article 39 (telle qu’amendée en 2025).

Important Notice for Québec Consumers:

WarmlyYours does not provide repair services for this product. The only replacement parts available are splice kits; the heating element itself is not available as a replacement part. If your indoor floor heating system fails within the warranty period, we will replace the entire unit according to our warranty policy. Our technical support team is available 24/7 by phone for installation and troubleshooting assistance. For full details, see our Return Policy. This notice is provided in accordance with Québec’s Consumer Protection Act, section 39 (as amended in 2025).

TempZone™ Cable Description

WarmlyYours TempZone™ Floor Heating Cable (Twin) brings radiant warmth and comfort to any room. This free-form cable provides the ultimate in flexibility, making it easy to customize installation for rooms of any size and shape. 

While ideally suited to provide complete floor heating coverage of rooms with unusual dimensions, the TempZone™ Floor Heating Cable (Twin) can be used in any room, providing an alternative for installers who prefer the flexibility and freedom of working with loose cable.

Specifications

Electrical

Amps 1.08 A
Cold Lead Wire Gauge 17 AWG
Floor Load 0.13 kW
Ohms 111 Ω
Ohms Per Ft 3.7 Ohm/ft
Thermal Power 0.13 kW
Voltage 120 V
Watts 130 W
Watts Per Sq. Ft at 3.75 Inch Spacing Up to 12
Watts Per Sq. Ft. 9 to 15
Watts Per Sq. Ft. at 3 Inch Spacing Up to 15
Watts Per Sq. Ft. at 4 Inch Spacing Up to 11
Watts Per Sq. Ft. at 5 Inch Spacing Up to 9

Warranty / Certifications

Approvals cULus listed
Warranty 25 Year Warranty
Wet Location Listed US, Canada

Performance

BTU Per Hour 444 Btu

Product Dimensions

Cold Lead Length 15′
Coverage 10 ft²
Coverage at 3 Inch Spacing 7.5 ft²
Coverage at 3.5 Inch Spacing 8.8 ft²
Coverage at 3.75 Inch Spacing 9.4 ft²
Coverage at 4 Inch Spacing 10 ft²
Coverage at 5 Inch Spacing 12.5 ft²
Heating Element Thickness 3/16″
Length 30′
Weight 1.8 lbs

Appearance

Color Red

Installation

Fixing Strips at 3 inch spacing 30
Fixing Strips at 4 inch spacing 30
Fixing Strips at 5 inch spacing 30
Floor Types Commonly installed beneath tile and stone
Ideal Cable Spacing with Competitor's Membrane 3.5″
Ideal Cable Spacing with Fixing Strips 4″
Ideal Cable Spacing with Prodeso Membrane 3.75″

Logistics

Package Contents (1) TempZone Floor Heating Cable 120V 3.7W/ft 30 ft 1.0A (TCT120-3.7W-030); 1x Floor Heating Sensor (FH-BACKUP-SENSOR)
UNSPSC Code 40101830

Identifiers

SKU TCT120-3.7W-030
UPC (GTIN-12) 881308048969

Installation Plans

This is a real example of an installation plan that uses this product. If you want to design your own room or have any questions, please contact us.

Flooring
Tile, Marble or Stone Subfloor
Unconfirmed/Other Voltage
120V Operating Cost
26 cents per hour
Design Your Own Project Get a Free Quote

This Installation Plan Includes:

1 x
TempZone™ Flex Roll 120V 1.5′ x 9′, 13.5 sq.ft., 1.7A
1 x
TempZone™ Flex Roll 120V 1.5′ x 70′, 105 sq.ft., 13.2A
2 x
Circuit Check
1 x
Electrical Rough-in Kit Single Gang Box with Double Conduits
1 x
nJoy WiFi Thermostat - Programmable, Class A GFCI, w/Floor Sensor

Frequently Asked Questions

While WarmlyYours electric radiant floor heating systems are typically installed by your floor covering contractor, a licensed electrician is recommended for the final thermostat hook-up. With every quote, we provide an Installation Plan layout, together with an electrical plan that has all the info required for the electrician.

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You can use the Instant Quote Tool, which gives you many options for your floor heating coverage. Use this interactive tool to design your room online and receive an instant quotation with product recommendations, rough-in and installation kits, cost of your control, etc. Planning your floor heating project is made easy when using our Instant Quote Tool.

Send us your floor plan or fax it to (800) 408-1100 and we will send you a quote, product recommendation and a free custom installation plan for your project.

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Our electric radiant floor heating systems have withstood rigorous safety testing and earned the UL listing. They produce much less EMF than common household appliances like your TV or vacuum cleaner. The EPRI (Electric Power Research Institute) tests all electrical devices and publishes the data. Many common household appliances are tested at a distance of 6 inches. The test results indicate that on average, the EMF emitted for the following appliances, measured in Milligauss (mG) units, is:

Vacuum Cleaner: 300 mG

Microwave: 200 mG

Portable Heater: 100 mG

Dishwasher: 20 mG

Washing Machine: 20 mG

WarmlyYours TempZone™ (Twin): 1.8 mG

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The floor heating systems are offered in both 120 volt and 240 volt for the North American market. A 208 volt breaker panel can also accommodate our 240 volt floor heating system. It is important to note that the energy consumption will be the same: a 240 volt system will not cost more to operate than a 120 volt system. You are billed in kilowatts, and the 120 volt and 240 volt systems use the same amount of kilowatts. WarmlyYours often specifies a 120 volt system in smaller projects while a 240 volt system is typically recommended for larger projects (120 square feet of electric floor heating coverage or more). The benefit of switching to a 240 volt system is the reduction in amperage. Our programmable thermostat can control a radiant floor system up to 15 amps. The 120 volt system will reach 15 amps at 120 square feet of electric floor heating coverage. However, the 240 volt system will reach 15 amps at 240 square feet of electric floor heating coverage, allowing a much larger system to be connected to the thermostat. For installations over 240 square feet, a relay contactor or power modules are needed.

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WarmlyYours’ TempZone™ product is most commonly installed under tile, stone, and marble flooring, but can also be installed under many other popular floor covering options such as hardwood, vinyl and linoleum. We also have our Environ system, which is an electric floor heating product as well and is specially designed for installation under carpet (in the U.S. only), laminate and floating wood. WarmlyYours can accommodate any flooring type with either of the electric radiant floor heating products that we offer. If your flooring type isn't listed here, just give us a call at (800) 875-5285 and we will be happy to discuss it with you.

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Customer Reviews