Loose Wire – NADWS

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Warmup’s loose cable is best suited for small, irregularly shaped spaces. It features a double-insulated wire with advanced fluoropolymers. The loose wire carries a high ohms resistance allowing it to provide heat outputs 25%-40% than any other cable on the market. Additionally, Warmup loose wire is backed by a lifetime warranty.



Loose Wire

Would you like to learn more ?

Can I Cut the Electric Floor Heating System Wire if I Have too Much?


This page explains why Warmup does not recommend you cut the wire for any reason and provides solutions to having too much cable.

Can I install a wooden floating floor directly on top of the cable ?


NO: cable must be embedded in thin-set or self-leveling compound. Once dry, the floating wooden floor will be installed on top. Alternatively, select the FOIL heating mats which can be installed without thin set.

Can I use an uncoupling membrane with the NADWS cable ?


Warmup now offers our own DCM-PRO cable, which is a custom designed cable compatible with all uncoupling membranes.

Can a wooden floating floor be installed directly over the Warmup NADWS system?


This page discusses installation methods required for installing a Warmup heating system under a floating wood floor.

Can I Cut the Electric Floor Heating System Wire if I Have too Much?


This page explains why Warmup does not recommend you cut the wire for any reason and provides solutions to having too much cable.

How to repair an electric floor heating cable system


Here is an instruction sheet that will guide you through the repair process of a damaged heating system wire.

Floor Heating Loose Wire Installation Video


Seeing is believing, so check out our installation video to see just how easy it is to install Warmup’s floor heating loose wire.  Click here to view it.

If I have too much mat or cable, can I cut it?


No, you should never shorten the heating wire. Click “Read More” for details.

Once a repair has been completed, can I replace the tile right away?


Upon completion of a repair it is completely safe to apply thinset and tile. Read more.

Can the Floor Heating System Work Without Installing the Floor Sensor Probe?


While you can operate your floor heating system without installing the floor sensor probe, there are good reasons to install it.  Click “Read More” for detailed information.

Should I use a 120V or 240V electric floor heating system?


As a rule of thumb, when you are using electric floor heating on an area over 130 sq ft, you will likely use a 240v system(s).  Click “Read More” to find out why.

What do I need to prepare for my electric floor heating project?


Before you order your floor heating system, there are a several things you can do in preparation. Read this before your start!

Make sure that the floor probe that came with the thermostat was installed and done so properly.


It is vital that the floor heating thermostat’s floor probe was not only installed but done so the right way.  Click “Read More” for details.

Confirm there is enough power being supplied to operate your electric floor heating system.


Follow these suggestions related to your power source to ensure excellent performance of your floor heating system.  Click “Read More” to learn what to do.

How to repair an electric floor heating cable system


Here is an instruction sheet that will guide you through the repair process of a damaged heating system wire.

The Factory Joint Rule


The factory joint MUST be installed in the floor. Click “Read More” for details.

Can the cold tail lead be cut?


Yes, you can trim the cold lead but must leave at least 3ft past the factory joint. Click “Read More” for details.

Why does my floor get warmer in some spots?


Your floor can reach higher temperatures in some areas where furniture, area rugs, dog beds or other fixtures are trapping the heat. Click “Read More” for details.

Why does my floor heat unevenly?


If wire spacing and floor height isn’t consistent, your floor may not heat evenly. Click “Read More” for details.

How do I check if the cable is working ?


The only way to see if the cable is going to work and is not damaged is to use an ohmmeter to check the resistance between the heating conductors matches what it should be in the manual or on the box.

Need also to check and make sure that there is no resistance to the ground conductor.

What is the EMF level of Warmup cables?


Our cable was tested and measured 0.5 mG at 1/2” (a typical distance between the cable and your feet). This measures at 1/200th of the acceptable value of 100 mG as established by the WHO and Intertek/ETL. It therefore complies with EN50366.

Specialized installation – under Nailed Hardwood


Floor heating can work under nailed hardwood as well.  Click “Read More” for detailed instructions to do it the right way.

How long will my system take to heat up?


It depends on a lot of factors, but a classic installation over ¾” plywood with NADWS spaced at 3” would take about 30 minutes to heat from 60F to 80F. Click “Read More” for details. 

Do I choose cable or mat electric floor heating systems?


This page explains the difference of the mat and loose cable options but ultimately either the cable or mat option will give you the design freedom you are looking for.

Was your electric floor heating system installed directly over a concrete sub-floor?


How does this effect your heat up times?  Click “Read More” for an explanation.

Should I use Self-leveler or Thinset ?


Using self-lever or thinset depends on the type of flooring being installed and preference. 

I nicked the wire slightly; do I need a repair kit?


When slight damage is caused to the wire, a visual assessment needs to be made. Read more.

Do I choose electric cable or mat floor heating systems?


While both options utilize the same advanced floor heating wire, each one has installation benefits depending on the actual shape of your room.  Click “Read More” to find out why.

Is the electric floor heating system wired correctly?


Be safe and follow these important reminders before troubleshooting your floor heating system.  Click “Read More” for instructions.

Can I install the electric heating cable directly on top of the plywood ?


YES: wood is a natural insulator, no need of extra insulation.
Exception: if this is a non-insulated crawl space under the plywood, in that case we would recommend the use of insulation boards prior the installation.

Can I connect one cable to another (series connection) ?


NO: each cable must be individually connected to the thermostat (connection in parallel).

Can I connect more than one cable to the thermostat ?


YES: if the total load of the cables does not exceed 15 amps.

What is the EMF level of Warmup electric floor heating cables?


Our cable was tested and measured 0.5 mG at 1/2” (a typical distance between the cable and your feet).

This measures at 1/200th of the acceptable value of 100 mG as established by the WHO and Intertek/ETL.

It therefore complies with EN50366.