FAQs

Floor Heating

Can Nuheat Mats be installed in wet environments such as shower beds and saunas?

Yes Nuheat Mats can be installed in wet environments such as shower beds and saunas. However, a separate Nuheat Mat is required for the shower area. If the Nuheat Mat in the shower is damaged, it cannot be repaired because the waterproof feature of the Nuheat Mat will be compromised. By using a separate Nuheat Mat in the shower, the floor heating in the bathroom floor will not be affected.

Can Nuheat Mats be repaired if damaged?

Yes, Nuheat Mats can be repaired using our mat repair kit. If you suspect that your mat needs to be repaired, please contact our Customer Care department at 1-800-778-9276. Your entire floor will not need to be ripped up to repair the break (this is a common misperception of electric floor heating systems).

Can Nuheat go under solid hardwood?

Nuheat is only permitted to be installed under laminate/engineered wood floors.

Do you have to wait for the thinset to dry before laying the tile?

No, this is a major advantage of installing Nuheat. Tiling can begin immediately after the Nuheat Mat(s) is thinsetted down onto the subfloor.

Does the mat radiate heat off the edge of the mat?

No, you will only feel heat directly over where Nuheat is installed.

Do the leads need to reach the thermostat?

Most contractors prefer the leads to reach the thermostat. However, it is also possible to run the leads into an accessible junction box and use regular house wire (Romex, etc.) to run the power from the thermostat to the leads in the junction box. However, the junction box has to be accessible and be covered by a cover plate.

Can the 10′ leads be extended?

Yes, all our leads can be extended up to 22' in length. Please include this request when ordering your Nuheat Mat.

Where do the leads come out?

On our standard mats, the 10' leads come out of the corner of the mat. There is no upside or downside on our Standard Mats so the mats can be flipped around so that the leads are closer to the thermostat location. On our custom mats, we require the homeowner/contractor to specify the location of the thermostat on their room drawings. When the custom mat is manufactured, the 10' leads come out at the thermostat location indicated on the room drawing.

How many mats can I connect to one thermostat?

The amperage limit of a single Nuheat thermostat is 15 amps. You can combine as many mats as you want to a single thermostat as long as the amperage load does not exceed 15 amps. It equates to 150 square feet at 120V and 300 square feet at 240V. For large spaces such as basements, we suggest "zoning" your space and using a second thermostat. Each mat will have their amperage rating printed on the electrical label. You can find the amperage rating of our standard mats on our product listing. Multiple mats must be wired in "parallel" to the thermostat.

What if the kit doesn’t fit my space?

If you have too much cable left over:
  • Double-check that you have purchased the right kit based on the square footage of the area. If the wrong kit was purchased, contact the distributor to see if a return is possible.
  • Install the cable in the buffer zone; a buffer zone is an area where excess cable can be installed. Examples of buffer zones include the area behind the toilet or a closet space.
  • Install the cable tighter to the perimeter of the heated area to use up extra cable (reduce the unheated border).
If you don't have enough cable:
  • Double-check that you have purchased the right kit based on the square footage of the area. If the wrong kit was purchased, contact the distributor to see if a return is possible.
  • Remove the heating cable from areas of the floor where heating is not essential. Examples of such areas are areas behind the door and areas directly in front of the bathtub.
  • Install the cable further in from the perimeter of the area (increase the unheated border).

Can two or more cable kits be installed together?

The amperage limit of a single Nuheat thermostat is 15 amps. You may use as many kits as needed provided the combined amperage does not exceed 15 amps. For large spaces such as basements, we suggest you "zoning" your space and using a second thermostat. Multiple cable kits must be wired in "parallel" to the thermostat.

Which is the neutral wire?

The black wire with the colored tip is the neutral wire.

How do I install Nuheat Cable in a shower environment?

Refer to our Shower Installation Instructions.

Can Nuheat Cable be installed in wet environments such as shower beds and saunas?

Yes, Nuheat Cable is permitted for this type of installation.

Can I cut the Nuheat Cable?

No, cutting the Nuheat Cable will cause the cable to fail and will also void the warranty. If too much cable is left, you need to install it in a buffer zone or re-install the cable closer to the perimeter of the heated area.

Can I change the spacing of the cable runs?

No, the spacing must be maintained at 3" spacing. Although 4" spacing is permitted, it is not recommended as this will result in noticeable cold spots on the floor.

How many amps can I load on one thermostat?

The amperage limit of a single Nuheat thermostat is 15 amps. You can combine as many mats or cable kits as you want to a single thermostat as long as the amperage load does not exceed 15 amps.

What should I do if the GFCI indicator is on?

Call your electrician.

Why is the clock flashing?

This means that the time has not been set. Follow the instructions in the virtual thermostat tutorial to learn how to set the time:

What can I do if I forget to install the sensor probe?

Check the thermostat instructions to ensure the thermostat has ambient sensing capabilities. If so, switch the thermostat to Ambient Mode by following the thermostat programming instructions:
  • SOLO Instructions
  • NTG Instructions
Please Note: Older units may not have this capability. If the thermostat does not have ambient sensing capabilities, contact your tile setter as it may be possible to install the probe in the grout lines of the tile.

How many amps can I load on one thermostat?

The amperage limit of a single Nuheat thermostat is 15 amps. You can combine as many mats or cable kits as you want to a single thermostat as long as the amperage load does not exceed 15 amps.

What should I do if the GFCI indicator is on?

Call your electrician.

Why is the clock flashing?

This means that the time has not been set. Follow the instructions in the Harmony Virtual Thermostat Tutorial to learn how to set the time.

What if I forget to install the sensor probe?

The Harmony Thermostat can function as a regulator. Refer to section 4.6 and section 5 in the Harmony Programming Instructions.

What does it mean when there is “LO”, “HI”, “E1″, or “E2″ on the screen?

These are known as error codes. Refer to section 4.7 in the Harmony Programming Instructions.

Freeze Protection

What is the weight of the MI cable kit?

Multiply the length of the MI cable kit by 0.15lbs (lenght x 0.15) to get the weight.

Can I use a 1″ conduit for the MI cold leads?

No, the brass fitting is already about 1" so you need to use at least 1.5" conduit.

How fast does the MI cable start heating and melt the snow?

It takes 30-60 minutes for MI cable to heat on light snow conditions and over 1 hour for heavy snow.

How high can the surface be on top of the MI cable?

It should be no more than 6".

What is the minimum topping of concrete over MI cable?

Heating cable must be 2-3" below grade.

What is the maximum length of MI cable cold leads can be shortened to?

There's no maximum length of MI cable leads.

Can the MI cable cold leads be shortened?

Yes, the MI cold leads can shortened.

What is the smallest square footage that MI cable can cover?

25 sq. ft.

Do you have a tape that’s rated to go on sprinklers?

Yes, we have a tape that can be used to secure our heating cable to a sprinkler or any metal and even plastic pipes. It is called the glass cloth tape and it is to be used for pipe freeze protection applications.

Do I have to connect the wire on the self-regulating cable before putting the end seal?

No, terminate by putting the end seal.

Can I splice different wattage cables together? For example, can I splice a length of 13mm 8-watt cable to a length of 13mm 5-watt cable?

Yes. As long as the two cables are the same dimension (ie. 13mm can only go with 13mm cables) and the same voltage (120V can only go with 120V), then they can be spliced together. However, do not exceed the maximum circuit length of the higher wattage cable. For example, if you are splicing the 13mm 8-watt cable to a length of 13mm 5-watt cable, use the shorter maximum circuit length of the two cables (ie. 8-watt cable) as the parameter.

Why do I need a controller when it is a self-regulating cable?

Even though it is a self-regulating cable, you need a controller to turn the heating cable on and off automatically. This way it will save power consumption.

Can I use the 9mm self-regulating cable for roof and gutter application?

No, 9mm cable is not CSA/UL approved for snow and wet conditions.

Can I plug in the plug-in kit to an extension cord?

No, it's says on the appliance tag that you can't as per code.

Will the self-regulating cable work underground?

Yes, the self-regulating cable is rated to go below grade on a pipe insulated.

Can I use the pipe freeze protection cable inside the pipe?

No, the cable is not UL/CSA approved to go inside a pipe or conduit.

Can two sections of self-regulating cable touch each other?

Yes, they can. Because they are self-regulating they will not burn out where they touch.
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