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FAQs

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What is Warming Systems Electric Radiant Floor Heating?
A network of low profile fully armored heating cables placed in mortar just below your flooring providing a warm floor and added comfort to the room above.

What are the voltage, amps, and wattage requirements?
Warming Systems has products designed for either 120V or 240V applications. The system is designed to supply approximately 12 watts per square foot.

How thick is the heating cable? 1/8"

What types of flooring may use Warming Systems floor warming systems?
Warming Systems floor warming systems are designed for marble, concrete, ceramic, tile, laminate, engineered wood, carpet, pavers, or slate floor types.

Is there anything I should consider when installing on a concrete slab?
Yes.  We recommend using some type of insualtion to avoid heat loss through the concrete.  We sell a synthetic cork underlayment called Cerazorb that does this http://www.warmingsystems.com/cerazorb-thermal-break-underlayment-2-x-4/.

How long does it take to warm a floor?
It usually takes approximately 1 hour to warm the floor, depending on floor types, distance from floor surface, and the insulating properties of the floor below.

How warm will the floor get?
There are many variables that can affect the floor temperature, but generally the floor will warm to about 90°F.

What's the difference between 120V and 240V systems?
Besides the difference in voltage, the amps are different as well. The amps on a 240V system are half the amps of a 120V system. For example a 50 sq. ft. 120V system is 5.0 amps. The 50 sq. ft. 240V system is 2.5 amps. The total watts on a 120V or 240V system are the same (12 watts/ sq. ft.). On the 50 sq. ft. system regardles of the voltage, total watts are 600.

The 240V system will not heat up faster than the 120V system and there are no energy savings besides the fact that there are less amps on the 240V system.  Both systems are 12 watts/sq. ft. and you pay per watt on your electric bill.

Does the Warming Systems product need to be installed by a professional?
Warming Systems products are designed for easy installation by the average do-it-yourselfer, making sure all local electrical building codes are followed.

How do I figure the size heating system required to warm my floor?
You will need to accurately measure the area of the floor you intend to warm in square feet. Do not include areas under objects such as toilets, vanities, or other inaccessible areas or permanent objects. Measurements should be as accurate as possible. For more information see Tips for Choosing the Right Size Product. If you still need help, email an accurately measured floorplan to design@warmingsystems.com.

Can the warming system be tested before installation?
Yes by measuring the ohm resistance between the black and white cold lead wires. The ohm reading is different for each size system.  The ohm resistance range can be found on the white label on the silver cold lead of the system.  Do not energize the cables prior to installation. 

I'm getting an odd reading on the sensor wire, what should I do?
The reading on the sensor wire is 8,000 to 12,000 ohms NOT 8-12 ohms. Don't let your fingers interfere with the reading.  Hook the sensor wire up to the thermostat, if you get a temperature reading it's OK.

Can the red heating element be cut? No. The length of the heating element can not be adjusted.

Can I cut the silver cold lead? Yes, the shielded cold lead can be cut to a desired length.

Can I  cut the floor sensor wire? Yes.

Can I overlap the heating element?
No.  The heating elements must not touch, cross, or overlap itself at any point. This will void the warranty and require replacement.

How close together can I put the heating cables?
The heating element should keep a minimum distance of 2" apart at all times.

How far does the heat radiate off the cables?
The heat radiates no more than 2" in  either direction of the cable.

What kind of mortar should I use?
Use a polymer modified cement based mortar.

I accidently cut the red heating element.  What do I do?
You can purchase a repair kit to fix it.

Can I install the heating system on a plywood subfloor?
We recommend installing the heating system on concrete or concrete backer board, but the system can be installed on a plywood subfloor.  Regardless of the subfloor, the heating system must be completely embedded in a polymer modified cement based mortar.

How close to the wall should I put the heating system?
We recommend installing 2" from the wall since the heat radiates no more that 2" in either direction from the cable.

Does the floor heating system need to be GFCI Protected?
Yes.  You can do this one of three ways.
1.  Use a GFCI protected circuit breaker
2.  Have the system tapped off the protected side of a GFCI outlet
3.  Use a thermostat with the GFCI built into it

Is the thermostat GFCI protected?
The aube by Honeywell thermostat (model TH115-AF-120S/TH115-AF-240S) that comes standard, and is the default thermostat option, is not GFCI protected. You need to have a GFCI protected circuit breaker if you use this thermostat. You can purchase the aube by Honeywell model TH115-AF-GA GFCI protected thermostat  or OJ Electronics Touch Screen model UDG4-4999 GFCI protected thermostat for an additional charge.

Can you connect multiple cables/mats to the same thermostat?
Multiple mats/cables can be connected in Parallel at the thermostat.  Mats/cables are not connected together on the floor.  The systems must be the same voltage.  Please see following question.

How large of a heating system can go on one thermostat?
You can put up to 150 sq. ft. of a 120V system on one 120V thermostat and up to 300 sq. ft. of a 240V system on one 240V thermostat.  Anything over these sizes requires additional thermostats or a power module.

What size electrical box should I use?
4" square electrical box with a single gang mud ring that's located within reach of the 10' cold lead.

How close to the toilet can I put the heating system?
Keep heating wires about 6" to 8" away from the wax seal on toilet. If the wax gets hot, it could melt.

Why is a "single" cold lead important?
This means that the end of the heating wire does not need to be run back to the thermostat.  This process makes the installation easier, and the average home owner can install the product themselves.

How long is the cold lead?
The cold lead that connects to the thermostat is 10 ft. long.

How long is the floor sensor?
The thermostat floor sensor is 10 ft. long.

Can I install the heating system under a traditional wood floor that I nail down?
No, but you can install our heating systems under laminate or engineered wood floors.

What warranty does Warming Systems offer on its products?
Warming Systems offers a "Life of the Floor" Warranty on its heating mats and cables. Thermostats have a 1-year warranty through Warming Systems and an additional 2-year warranty with the thermostat manufacturer.

Can I install Warming Systems Products outdoors?
No. The electric floor warming systems manufactured by Warming Systems Inc. are designed for interior floor applications, supplying 12 watts/square foot. They cannot be used for exterior snow melt or ceiling heating applications.

How much does it cost to operate an electric floor warming system?
Electric floor warming systems are very cost effective to operate. An average bathroom uses about the same amount of energy as two 100-watt light bulbs. Used in conjunction with a programmable floor-sensing thermostat will make the system even more efficient.

How is my order shipped?
Orders being delivered within the U.S. are shipped via UPS. Orders delivered to Canada are shipped via USPS (United States Postal Service).