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Frequently Asked Questions

ANSWERS TO YOUR QUESTIONS

In an effort to continuously improve our service, below are the answers to the most frequently asked questions.

The thermostat programming and installation guides are provided by FLEXTHERM when you purchase the thermostat.
To download the installation guide in PDF format, visit the thermostat pages of this website.

The installation guide is an integral part of the kit provided by FLEXTHERM when you purchase a radiant floor heating system. To download the installation guide in PDF format, simply go to a specific product page in this website and selected the desired document on the right-hand side of the page.

Radiant floor heating means heating masses directly rather than ambient air. The comfort achieved using this method is vastly superior to classical heating methods such as baseboards, wall-hung radiators or hot air systems. With their feet nice and warm, people who choose radiant floor heating are more comfortable and save a lot of energy.

Depending on the application, FLEXTHERM cables can be installed on a wide variety of subfloors, including: plywood, smooth concrete, concrete panels, ceramic, acoustic membranes, anti-fracture membranes, scratch coat, mortar bed or buried in a concrete slab. Just follow the recommendations in the FLEXTHERM installation guide to achieve the best result for your installation.

Depending on the product, FLEXTHERM cables are compatible with a wide range of floor coverings, including ceramic, natural stone, engineered wood, vinyl, floating floor, linoleum, parquet and carpet. For coverings other than ceramic or natural stone, it is important to always check with the manufacturer in order to make sure that its product is compatible with floor heating systems. Just follow FLEXTHERM’s recommendations to achieve the best result for your installation. FLEXTHERM does not recommend installing heating cables under hard wood or cork.

If you install the system on smooth concrete, the concrete slab must be insulated to prevent heat loss and maximize the benefits of radiant floor heating. There are a variety of products available on the market that you can use to create heat barriers. Insulation product suppliers will be pleased to give you some advice.

The cost depends on the installation process and several other factors: the local price of electricity (KwH), heat loss and the insulation of the room, the desired comfort level and the heating period. A radiant floor heating system can help you reduce your energy consumption by as much as 28% compared to traditional systems.

Radiant floor heating can be used as the primary heat source for a room. Several factors must be considered: the level of subfloor insulation, the size of the room, the exposure of exterior walls, the window coverage, the desired comfort level and the system’s output.

FLEXTHERM floor heating systems can help you reduce your energy consumption by up to 28% according to studies conducted by ASHRAE (American Society of Heating, Refrigeration, and Air Conditioning Engineers) specialists.

FLEXTHERM products can be installed on 120 VAC or 240 VAC electrical circuits, more commonly known as 110 or 220. It is possible to supply 208 VAC systems for special projects on special order. In all cases, the circuit must be dedicated to heating.

FLEXTHERM floor heating systems include detailed installation instructions. An experienced do-it-yourself enthusiast can install the heating cable by following the installation guide. You must ensure that the installation is carried out in compliance with the electricality code of your region. The system must be installed by a qualified person where required by law.

Never! FLEXTHERM cables are manufactured according to very strict quality standards, which are applied at the plant to preserve their integrity and ensure a long service life. The cable is calibrated at the plant to meet the heating needs of a floor of a specific size. Cutting it will make it unusable and the warranty will be cancelled. Cables should never be spliced (i.e. joining two cables).

An electromagnetic field (EMF) results when an alternating current runs through an electrical wire. Electrical appliances emit them. There is no practical technology that can fully eliminate (shroud) EMFs. FLEXTHERM technology offers the best solution on the market, with a level that varies between 0.25 mG and 0.50 mG when the system is installed according to the installation instructions. This is much lower than the government’s recommended level, which is why it is considered negligible

The cables are anchored using the Universal Snap-In GagesTM supplied by FLEXTHERM. They are specifically designed to installation easy and ensure even spacing for your type of installation. Furthermore, it is the only cable anchoring method that is covered by the FLEXTHERM warranty.

Never! That will void the warranty. You must always use the FLEXTHERM Universal Snap-In GagesTM.

FLEXTHERM can provide you with a severed cable repair kit. The FLEXTHERM Customer Service Department offers support for repairs, as needed.

Yes. FLEXTHERM cables are manufactured according to very strict quality procedures that satisfy the CSA standard for installation in wet environments. These rigorous manufacturing methods give FLEXTHERM cables a distinct, unrivalled edge over the competition.

Yes. FLEXTHERM cables are manufactured according to very strict quality procedures that satisfy the CSA standard for installation in wet environments. These rigorous manufacturing methods give FLEXTHERM cables a distinct, unrivalled edge over the competition. A separate cable from the one covering the bathroom floor must be installed in the shower.

The time required to install the tiles after glazing depends on the products used for glazing. Generally speaking, anywhere from 3 to 24 hours of drying are necessary. Check with the supplier or manufacturer of the mortar or self-leveling underlayment.

FLEXTHERM cables are approved for installation in a solarium. Depending on your solarium's insulation, heat loss through windows and your geographical situation, it may be recommended that you add a secondary heating system for the coldest winter periods.

If you have ceramic tile floor covering, it is possible to install it between two ceramic tiles (in the grout mixture).

In all other cases, contact the Customer Service Department for assistance.

The FLEXTHERM thermostat precisely controls floor temperature in the room where it is installed, using a probe in the floor. Because a ground fault circuit interrupter (GFCI) is integrated in it, the thermostat also protects room occupants and the heating cable in case the system malfunctions.

Yes. Just program the thermostat by following the instructions provided with the thermostat. It is possible to program up to 4 cycles per day for each day of the week. See the interactive programming guide.

Consult our interactive programming guide to find out how to program your thermostat.

FLEXTHERM cables provide a limited warranty depending on the product and subject to an installation that complies with the installation guide provided at the time of purchase.

Green CableTM Surface 2 W and 3 W, Green Cable Mat: 25 years

Green Cable Concrete: 10 years

Programmable electronic thermostat,electronic dial thermostat, conversion and expansion units kit: 2 years

Refer to the Products section for more details.

Open the door on the right.
Check if the interrupter is switched to the On position. Switch it to the On position if it isn’t already.
Check if the electric panel interrupter powering the circuit is switched to the On position. Switch it to the On position if it isn’t already.

Yes. The thermostat can operate in manual mode.
Open the door on the right.
Press MOD/RET as many times as necessary until the small hand appears on the screen. (image de la main du thermostat) Set the temperature by pressing the ring (upward to raise the temperature, downward to lower the temperature).

Open the right door
Press D, H or M to access the menu
Select the day using the D button
Press MODE/RET to leave the menu

Open the door on the right
Press D, H or M to access the menu
Press H to set the time and M to set the minutes
Press MODE/RET to leave the menu

Open the door on the right, switch the interrupter to the OFF position, then to the ON position. If the situation persists, have the cable and insulation resistance checked by a qualified electrician. Contact the Customer Service Department for assistance.

Open the door on the right, switch the interrupter to the OFF position, then to the ON position. If the situation persists, have the cable and insulation resistance checked by a qualified electrician. Contact the Customer Service Department for assistance.

Have the cable resistance checked by a qualified electrician. Contact the Customer Service Department for assistance.

Use the FLEXTEST (link on flextest), an ohmmeter or a multimeter to measure the resistance between the two black wires. Record the results on the warranty card. The measurement should be similar to the resistance indicated on your cable label (± 5%). If the measurement differs from these parameters, contact the Customer Service Department for assistance.

Use a megohmmeter to verify the integrity of the cable’s insulation. If the cable is intact the reading will be “infinite”. If there is leakage between the heating element and the insulation, the reading will indicate a value lower than 250 MOhms. To repair this leakage, contact the Customer Service Department.

Contact the Customer Service Department for assistance. You will need an ohmmeter and a megohmmeter to verify the heating cables.

Unscrew and remove the front of the thermostat. Check behind the front of the thermostat to make sure that the position of the temperature mode selector is set to F. Contact the Customer Service Department for assistance. You will need an ohmmeter and a megohmmeter to verify the heating cables.

The thermostat keeps the same programming at all times. You will need to adjust the day and time after a power outage lasting more than 2 hours. You can download these instructions by going to the Programming and Settings page

This means that there is an error with the probe. Verify that the probe is correctly connected to thermostat connectors 3 and 4. (There is no polarity.)

Verify the probe resistance. It must be between 8 and 12 KOhms at an ambient temperature between 20 °C and 30 °C. Replace the probe if there is no resistance.

Contact the Customer Service Department for assistance.