Slab Heat Cables Support

Yes. Unlike the heating cable for electric floor heating, the cold lead wires can be trimmed.

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Yes, but any furniture that may trap heat, such as pieces with an enclosed bottom, should be avoided. Furniture on legs with a clearance of at least 3" is permissible.

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Electric-resistance heating cables and systems have no polarity. This includes all current WarmlyYours heating elements.

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The amount of amperage draw depends upon how large the area is that you are heating. For coverage of areas less than 30 square feet, a 120V Slab Heat system will draw less than 6 amps. If you have a larger area over 180 square feet of heated space, then you will need a larger breaker plus additional controls. No matter what the size of the area you choose to heat, we recommend a dedicated circuit for your electric radiant floor heating system.

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The breaker and wire sizes are selected based on the total amperage of the WarmlyYours heating system connected to a single thermostat. This information is on the WarmlyYours heating system's installation plan, electrical plan, or UL label. Based on guidelines from the National Electrical Code: loads up to 16 Amps may utilize 12 gauge wire with a 20-Amp breaker, and loads up to 12 Amps - 14 gauge wire with a 15-Amp breaker. Local code and/or other factors may change these guidelines.

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One thermostat can control multiple heating mats/cables as long as all the heating elements are using less than 15 amps:

TempZone™ will cover aprx. 120 sq. ft. for 120V systems and 240 sq. ft. for 240V systems on one thermostat.

Environ™ will cover aprx. 150 sq. ft. for 120V systems and 300 sq. ft. for 240V systems on one thermostat.

Slab Heat will cover aprx. 90 sq. ft. for 120V systems and 180 sq. ft. for 240V systems on one thermostat.

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Yes. In addition to TempZone™ and Slab Heat, we also have specially sized Shower and Bench mats designed specifically for shower installation. They are all wet location listed for radiant floor heating in a shower.

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WarmlyYours has recently begun including floor sensors with our heating elements to help ensure customers will have everything they need for optimal operation of their radiant heating systems.

The sensor included with your floor heating element can be installed with the heating system (the sensor is equally spaced between runs of the heating wire--see your install manual for more info). Installing this sensor with your floor heating control will enable energy efficient operation of the floor warming system based on the floor temperature instead of the ambient room temperature.

We generally recommend that you install a second, unconnected backup floor sensor alongside the primary one. In the very unlikely event that your first floor sensor is damaged, this install method will save you from having to pry up flooring to replace a floor sensor. You simply disconnect the damaged sensor from the thermostat and connect the backup sensor.

In addition to the floor sensor that was included with your heating element, our nSpiration Series thermostats also come with a floor sensor. If you purchase both a heating element and an nSpiration Series thermostat from WarmlyYours, you'll have a primary and a backup floor sensor for your system.

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The requirements are determined as follows: plan on 20 watts per square foot (at 3" spacing) without a floor covering; or 15 watts per square foot (at 5" spacing, cable only) with a floor covering. To calculate approximate power requirements, multiply the square feet by either 20 or 15 (per the above), and then divide by the voltage (120V or 240V) to arrive at Amps.

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82°F - 85°F is the most common comfortable warm temperature of the floor.

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You can control your slab heating system with any WarmlyYours nSpiration Series thermostat. Depending on the size of your project, you may also need to add a relay or nJoin power module.

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Stop installation, box out a 3"×3" area surrounding the damaged area, and call tech support at (800) 875-5285.

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Any trade professional is qualified to layout slab heating cables and/or mats; electricians must make the electrical connections and test the wire; you can hire a concrete contractor to install the concrete for you.

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The Slab Heat radiant system adds no additional height. This is because it is embedded within the concrete pour.

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Test the Slab Heating cable or mat using a digital ohm meter as shown here. Also test the slab heating cable or mat using a Mega Ohm meter as shown here. And this video shows how to do the Ohm test.

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The layers for the full installation are as follows:

• Bottom: 8-10" of compressed crushed rock aggregate (may already exist)
• 2" polystyrene insulation
• 2-3" layer of concrete
• Rebar and/or reinforcing mesh and attach the cable or mat
• Top: Pour a 2-3" layer of concrete as the final flooring surface

Call tech support at +1 (800) 875-5285 to customize this to your unique application.

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You should install the cable 2-3" below the finished surface, and attach it to rebar and/or reinforcing wire mesh to secure the cable in place.

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The ground wire in the floor mat must be connected directly to the ground wire of the supply or to the house ground wire.

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No. A bathroom floor would be installed in the same way. Our Slab Heat floor heating systems are wet-location listed and great for bathroom floors.

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