SunTouch UnderFloor 12"

SKU: SunTouch UnderFloor 12"
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SunTouch UnderFloor is a safe and efficient radiant electric floor heating system retrofitting an existing cold floor with heat without disturbing the existing floor covering.

UnderFloor is for interior applications only and is intended only for installation under an existing wood subfloor (accessed from underneath via crawl space, basement, or garage ceiling) in residential and light commercial installations.

Insulation is essential after mats are installed into joist spaces.

We recommend SunTouch UnderFloor Mats be installed in all areas where floor warming is desired; the floor is only warm directly over an installed mat.

If UnderFloor is being installed to heat the space, first perform a heat loss calculation to determine the amount of BTUs required to heat the space.

Instructions + Video

Video

Indoor / Outdoor

INTERIOR floor heating Application only. Never embedded in Mortar.

Install Steps

Installation Steps

SunTouch Underfloor Installation Step 1

Step 1

Unroll mat and staple 1 side to side of first joist so foil will be 2 from Sub floor above and hangs down like a curtain.

SunTouch Underfloor Installation Step 2

Step 2

Staple other side to opposite joist. Each mat must fit within a single joist bay.

SunTouch Underfloor Installation Step 3

Step 3

Mount Electrical boxes and connect mats in parallel to power in junction boxes. Follow applicable building and electrical codes, using conduit to electrical boxes as required. 15 amps maximum per thermostat. If you have only a few mats, the power leads may reach the thermostat without a Junction Box.

SunTouch Underfloor Installation Step 4

Step 4

Connect the SunStat thermostat and test the system. Then install fiberglass insulation batts (R-11 to R-19) up to the mats. Insulation must be installed at the ends of the joist bays vertically or 6 inches after the mat ends.

Kitchen Layout Example Using UnderFloor Mats

Each electric UnderFloor heating mat is designed to be installed in a single joist bay. The heating mats cannot be cut shorter to fit a shorter joist bay or altered in any way.

Do not try to fill multiple joist bays with 1 mat. However, multiple mats may be installed in a joist bay where there are obstructions (such as cross bracing) as long as they do not overlap or touch.

In this layout, four 9.5'x16" and eight 4'x16" mats are required to warm the floor area.

Kitchen Layout Example Using UnderFloor Mats

The heat mats are wired together in parallel (not in series) in junction boxes below the floor, then an electric wire is fed over to the SunStat control.

Mat lengths should be selected so they fit completely within each bay and allow for the easiest wiring. When all the power leads start on one side, it will be easy to wire them together in the junction boxes. Code requires junction boxes to remain accessible at conclusion of the job.

Minimum Installation Temperature

50° Degrees F / 10° Degrees C

Power Supply & Wiring

Mats or WireSupply WireBreaker
VACtotal amps(AWG*)qtytyperating
120up to 12 amps141single pole15 or 20 A
120up to 15 amps121single pole
20 A
240up to 12 amps141double pole15 or 20 A
240up to 15 amps121double pole20 A

* Recommended only. Follow local codes for wire gauge size.

Wire Construction

ETFE Fluoropolymer, metal shield and Radiant Foil

Maximum Circuit Load

15 Amps

Maximum Circuit Overload Protection

20 A Breaker.

Distance from Toilet

See manual; 2-8" from most. Do not let foil touch any metal

Specifications

UPC 840213080686
Heating Power Output Total 187 BTU total
Heating Power Output per Hour (BTU) 34 BTU per Sq Ft/Hour
EMF (Electro Magnetic Field) Yes. Verified by Independent Testing Laboratory as ultra low. REET test
Ohms Reading (resistance value) 247-302 ohms
Power Lead Wire Gauge 18 AWG
Power Lead Type Armored, NEC color code, Single point connection at 1 corner of mat. No return wire like inferior products
Thickness 0.125 (less than 1/8")
Voltage 120 VAC
Wattage per SF 10
Manufacturer Watts Radiant
Power Lead Length 10 Feet

More Details

Brand Name SunTouch
Warranty from Manufacturer 25 Year backed by 140 year old USA Manufacturer
What's In The Box Mat, Detailed Installation Manual.
Amp Draw 0.4
Safety Listing UL (Underwriters Laboratory) Listed for U.S. and Canada under UL 1673 and CAN/CSA C22.2 No. 130-03, File No. E185866
Total Watts 55 watts
Size in Inches 12" x 66" (12x66 inches)
Size in Feet 1' x 5.5' (1x5.5 feet)
Size in Meters 0.3m x 1.68m (0.3x1.68 meters)
Acceptable Floor Coverings Natural Stone,Tile, Laminate, Engineered Woods, Carpet, Vinyl, Linoleum, Solid Hardwood

Reviews

Customer Reviews

Overall
Easy install
Review by
I installed the product and got an electrician to hook it up. Floor started at 66 degrees and now is maintained at 80-84 degrees depending on time of day. Very good.
Overall
Excellent!
Review by
Yes, it was as easy as the installation guide makes it seem & works great. The floors (tile) just get slightly warm but enough so you definitely notice it when in bare feet!
Most time consuming part of the install was breaking off all the ends of the screws protruding thru the floor that were securing the tile underlayment. The actual product install was easy so someone with even a moderate level of "handyman" experience could handle it.
Overall
It was very easy to install, and works just as advertised.
Review by
I am very happy with your product! It was very easy to install, and works just as advertised. So very few things actually do what they say they will. The thermostat works flawlessly. For my size project, the loud mouth wasn't really necessary, but since I will probably buy more of your product, it will be available.
Overall
They do exactly what I was hoping to achieve.
Review by
I had no trouble with installation of your products and I am very satisfied with the results. They do exactly what I was hoping to achieve a gentle warming of my problem floor areas that made sitting in the dining room area uncomfortable on socked feet and getting out of the shower a chilling experience.
Overall
LOVE this new UnderFloor!
Review by
LOVE this new UnderFloor Retro-Fit option for us cheapskates who didn't opt for in-floor heating when we originally remodeled!
Overall
UnderFloor heat made the floor fantastic!
Review by
This is the second in floor heat heating system I purchased from Warm Your Floor. Back at the start of winter I added heat to a bathroom remodeling project with UnderFloor heat. The bathroom project had already been completed when we realized that tile flooring in the freezing Rochester NY winter is tough on bare feet. So adding the UnderFloor heat made the floor fantastic.
We love the floor heat so much that when we started a walkout basement project we added heat below the tile in the entry and bathroom. We're still in the remodeling phase but the system is in and waiting to be started. We're very glad we did, it will be such a big addition to a beautiful floor and project.
Overall
This product was so easy to install and works amazing!!!
Review by
I would recommend this product to anyone for your future project. There are many products out there but this one is the best.
Overall
They really work!
Review by
Awesome customer service and my floor is fabulously warm! I used the underfloor mats and they really work!
Overall
Awesome the way it heats the floor!
Review by
Just a short note thanking you for a great product!!! It is totally awesome the way it heats the floor!!! Debbie (my wife) is very, very happy with it. Sarah Gans, our decorator on this project, was also impressed. Lee Weis, the marble installer, also see’s several applications to it. So the product is great and so are you and Shelley. Just wanted to drop you a note so if you need a testimonial on your product. I would use in-between floor joist product (SunTouch UnderFloor) because of ease in getting to for repairs, more consistent heating (no hot spots), and the programmable thermostat is so awesome that should be the only one available. Thanks Again
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