Heated driveway?

Commercial snow melting. (E.g. TOYOTA + ELEKTRA).


ONDOL - The Korean invention

American Legend: Architect Frank Lloyd Wright

From STONE COLD to NICE WARM floors in just 2 hours?

New Kitchen Project. (Part 1)

New Kitchen Project. (Part 2)

Radiant heating in one day?

From cold slab floor to comfort and beauty.

How to connect UCCG-9991 programmable thermostat for radiant floor heating?

How to connect MTC-2991 manual thermostat for radiant floor heating?

How to choose the in-floor radiant heat ELEKTRA mat?

Many components of the Great Real Estate. (Part 1).

Many components of the Great Real Estate. (Part 2).

How to connect more than 1 mat?

The problem on the roof

Installing radiant floor heating in just one afternoon.

Cathedral ceilings effect & Medieval Hypocaustum (floor heating)



Step-by-step one electric radiant heating mat installation. Do it once - do it right!
Enjoy for 30+ years!




1. Measure the room for floor tiles. You will need 10-20% more than actual square footage of the floor since the tiles will be cut.



2. Measure the room for floor heating. OPEN 'walkable' AREA ONLY. Not under cabinets, shower stalls, toilets, vanities etc. It will be some 10-60% less than square footage of tiles to be ordered.


Two worst case scenarios to avoid at all cost: 

  • Ooops #1: Not enough tiles (and the store can't get 'em anymore),
  • Ooops #2: Too much floor heating! It will need to be swapped for a smaller unit.




3. Mark the outline of the future vanities, toilets, showers etc. Standard cabinets or vanities are 22-24" deep. Toilet bowl base can be anywhere from 9" to as much as 20" long, measured from the drain opening on the floor towards the front of the bowl. Tip: the more expensive the toilet, the longer the bowl will most likely be.




4. Get the RIGHT size mat. 120V? 240? Getting one smaller than the available space is not a problem. Getting one too big WILL BE A PROBLEM. Heating elements cannot overlap or be cut off.



5. Locate the convenient spot for the thermostat. It does not need to be in the same room as it is going to sense the floor temperature based on the floor temp. sensor reading. The sensor wire is 10 ft. long and can be extended. The sensor is low voltage. Thermostat (sometimes called 'a floorstat') is LINE VOLTAGE (110-120V or 208-240V).  The mat (or mats) or a heating cable is connected to the thermostat.

Follow the code (distance from water, GFCI protection, dedicated circuit etc.)

After everything is done, the thermostat on the wall will be the only visible part of the system. Everything is to be hardwired, hidden from view and from tiny fingers. 100% SAFETY IS OUR #1 PRIORITY.  For the manual thermostat consider GFCI protection. For bathrooms and kitchens this is often a must. Our programmable thermostat is GFCI protected.




6. Locate the spot where the wires from the mat(s) will go into the wall to be connected to the thermostat.  Thermostat floor temperature sensor will go from the thermostat to where the mat(s) or a heating cable is.



7. To be sure that everything is as expected, check the mat(s) resistance. Different size mat(s) or cables have different resistance. It ranges from 16 Ohms to as much as 250 Ohms depending on the model and its voltage. Mats (or cables) are voltage specific and need to be powered by appropriate voltage.



8. Cut the mat to accomodate the shape of the floor. NEVER cut or nick the heating wire! 



9. Install the mat on the floor. For MG mats (two connecting wires) leave yourself a room for the return wire. MD mats have one connecting wire but then the mat is thicker than MG models.



10. Maintain the distance between heating wires. 2" is best. Heating wires cannot cross or otherwise be close together. NO MAT OVERLAPPING!








11. Continue on untill you run out of the mat. For MG mats (two connecting cords) it is time to loop it back to the thertmostat. Using the narrow strip from the end of the mat with the heating wire attached is better than extending the cold lead wire. You will need a room for it next to the wall, so while installing, leave a few empty inches next to the wall  to use as a 'loop back' area at the end. 



12. When satisfied with the layout, staple the mat's mesh to he floor. DO NOT STAPLE THE HEATING WIRE. When going over 'backerboards' or 'woderboards' use 1/4 in. staples. Longer staples will bend.

If installing over cement slab use hot gue gun. Careful! THE HOT GLUE GUN GETS REALLY HOT!




13. Locate the spot for the thermostat sensor. The head of the sensor sholud be  1.5-2" away from theating element of the mat. 




Now it's time to test again.

When OK - you can either tile right away or skimcoat the mat with thinset and tile later.


Last but not least


Please remember: Electricity can be deadly and wiring done incorrectly can kill and start deadly and destructive fires even when "just replacing one small receptacle". 


NEVER EVER attempt to work or even touch the inside of the electrical components without being 100% sure that the power is disconnected!

If you are not an electrcian and if you have the slightest doubt about your wiring ability, please contact a licensed electrician and/or repairman before doing any diagnosis, repairs or installations. The products shown here are deemed SAFE and sound by various testing authorities but the wiring process can only be SAFE when done with safety precautions. Please read manuals and/or ask pros when not sure. Most of the simple installations shown here can be done by yourself or you can have someone qualified do it for you and THEN have the electrician check it and connect it to power.    



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IBM - PL. Why no driveway or steps will need to be shoveled or salted when winter arrives.
Is electric radiant floor heating ENERGY EFFICIENT?
Likely yes
Likely no
Don't know