DEVImat Underfloor Heating Mats

Key Features of DEVI Heating Mats

Long lifetime with a 20-year warranty3 – 4.5 mm thickness
Easy to install - ready to lay on the floorSelf-adhesive mesh design
Premium, well trusted brandExcellent value for money

DEVI heating mats have been created for a wide variety of applications. This includes domestic and commercial electrical heating, as well as indoor and outdoor heating solutions. The DEVImat system provides a cost effective method of providing warmed floors.

At Underfloor Heating UK, we offer a full range of DEVI electrical heating mats for floor heating systems. DEVI heating mats can be used for new build projects and renovations projects and are ideal for use in areas such as bathrooms, kitchens and conservatories in both new build and renovation situations. They are extremely thin and are very easy to install making it convenient and hassle free to install an electrical heating system in large areas. Their 20-year warranty covers product, installation and new floor costs.

Completely unseen in the home, DEVImat is easy to size and quick to install, totally safe (CE compliant), and easily controllable. The mats can be used under any type of flooring: such as tiles, laminate or wood. The mats have a round profile and are very robust which ensures a fast, simple and safe installation. This makes them perfect for renovating existing floors.

DEVI Floor Guard Warranty not only guarantees it’s heating systems but also guarantees the floor in the unlikely event that the system cannot be repaired due to a manufacturing fault. Other manufacturers only offer product warranties which do not include the replacement of the flooring.

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    Frequently asked questions

    Underfloor Heating UK DEVI systems are suitable for both heating the entire room or floor only, depending on your requirements.

    Poorly insulated areas and in very cold conditions, may require additional heating if you wish to ensure that the room is well heated. Using insulation and a higher heat output system will reduce the need for this.

    At Underfloor Heating UK we offer a free expert design service to help you ensure that your Underfloor Heating UK DEVI heating system heats as much or as little as you need.

    Generally, we would advise that the property should be airtight before the installation of underfloor heating, but this would also depend on the schedule of your individual project.

    All of our Underfloor Heating mats come with a full set of installation instructions, providing a simple step by step guide. Most systems can be installed on a DIY basis. But the final electrical connection should be made by a qualified electrician.

    Installation of underfloor heating is obviously easier within a new build project, but if designed correctly, you can still enjoy the benefits of heating your property using underfloor heat on a retrofit basis.

    Yes it can.

    From the main menu, go to Settings > Options > Dim level, and select OFF. With the same navigation, the safety lock, forecast (adaptive function, both start and end), window open and min. floor temperature can also be turned off.

    Yes, underfloor heating is a great way to warm your home. It’s lovely to walk on and distributes heat evenly around each corner of the room, freeing your walls from radiators, so its not surprising that the bathroom is the most popular place to install electric underfloor heating. However, it is common practice to locate the thermostat on an outside wall (typically on the landing or in the hall) with the floor probe running through the wall into the floor where the heating is installed.

    Underfloor heating can be used with most types of carpet. A self-levelling compound is required and as long as the underlay is not a good thermal insulator (i.e not felt), heat will easily pass through this layer into the carpet itself. The overall Tog value of carpet and underlay combined should not exceed 2.5 with the underlay itself not exceeding 1 Tog.

    Yes, we include a DEVIreg Touch programmable thermostat in all of our kits. This stylish cutting edge thermostat uses pulse width modulation with optimum start and optimum end programming as well as open window detection to guarantee extremely high temperature control accuracy, ensuring the DEVIreg touch is one of the most efficient Underfloor Heating controls available.

    An easy and clean solution such as DEVImat gives you possibility to leave an old floor without removing it and creating unnecessary mess. The thought of broken up floors and craftsmen running in and out of the house used to be enough for most people to simply drop the idea of having their feet and floors heated.

    Today, there is no need to shiver when thinking about floor heating. You are able to get a warm floor without going through the expenses, dirt, and fuss of having to break up the old floor.

    The DEVImat is only between 2.3 mm and 4 mm thick, depending on type. It can therefore easily be fitted directly on to your existing floor, whether it is concrete, timber or even an old tiled or terrazzo surface, without needing to cut up the existing floor construction.

    The DEVImat is installed within the thickness of the tile adhesives and, therefore, adds no significant height to the floor level. Consequently, there should be no need to reduce door heights, raise skirting boards, etc.

    During the summer months or when it is warm, you may wish to turn off your underfloor heating. All of our thermostats have an on/off switch, which can be used to turn off your underfloor heating system.

    We strongly recommends that each section of floor with a different covering has its own ‘mat’ as well as thermostat since each floor surface has a different maximum temperature limit. We advise to use a thermostat with a floor heating sensor.

    Please contact us to discuss the best options for this floor.

    A floor sensor is a device that is connected to the thermostat, and allows the floor temperature to be fully controlled.

    The floor sensor is wired back to the thermostat, and connected to the “NTC” terminal. There is no polarity on the cables.

    DEVI always recommends installing a floor sensor. The DEVIreg Touch / 550 / 535 / 540 thermostats can be programmed to operate as any 1 of these 3 options:

    • Air sensing
    • Floor sensing only
    • Air & floor sensing

    A Floor sensor must be installed when floor or floor/air sensing is chosen. Without a floor sensor, the maximum floor temperature cannot be controlled. A floor sensor is essential with wood, vinyl or carpet floor coverings.

    This is the connection at the end of the twin conductor mat where the heating element is connected to the neutral return. This is manufactured within the cable.

    When choosing a thermostat for your underfloor heating system you need to decide what characteristics you want from your thermostat.

    Manual - A manual thermostat will provide total control when using your underfloor heating. Simple to use, they are ideal to manually regulate the temperature for almost any underfloor heating application.

    Digital - Programmable digital thermostats are a modern and timeless alternative to the manual thermostat, offering complete control for your underfloor heating. Automatically adjusting the heating to meet your comfort level, regardless of changing weather conditions by measuring the floor temperature and combining it with the air temperature.

    Touchscreen - A touch screen thermostat will provide stylish total control of your electric underfloor heating system. Touchscreen thermostats can be combined with an existing system, providing a smart yet simple upgrade with advanced intelligent energy-saving features to cut heating bills without compromising comfort.

    The correct floor covering should be carefully considered to ensure heat is not prevented from rising into the room by the floor covering. We offer expert advice on floor covering to ensure the best results without restricting the design of your home.

    Product reviews

    4.895% Positive (39 reviews)

    Ratings based on data collected by third party reviewing platform.


    Trusted Customer
    16 November 2019 12:12

    DEVImat 200W/m² DTIF-200 8.8m² 1715W Underfloor Heating Mat

    Good quality and easy to install - DIY.

    View product

    The service I received was second to none. If the product responds as well once it has been commissioned, I will be over the moon.


    Christopher Mcclelland
    14 May 2019 10:05

    DEVIcomfort 150W/m² DTIR-150 1.5m² 225W Underfloor Heating Mat

    Excellent product. Easy to install.

    View product

    Excellent to deal with and extremely fast delivery.

    Fantastic to hear, thank you very much for your review.


    Trusted Customer
    22 April 2019 23:33

    DEVIcomfort 150W/m² DTIR-150 7.0m² 1050W Underfloor Heating Mat

    Does what it says. Works fine.

    View product

    Bought again from Underfloor Heating. Always great service. Competitive pricing with efficient delivery.

    Thank you very much for the really fantastic review of our service we appreciate your great comments.


    Two Ltd
    9 November 2018 09:10

    DEVIcomfort 150W/m² DTIR-150 8.0m² 1200W Underfloor Heating Mat

    Excellent Product. Fits Our Requirement Perfectly

    View product

    Fantastic Service, Quick Delivery. Will use Underfloor Heating UK for all of our underfloor heating projects

    Thank you very much for your really great review.

    I will pass on your positive comments to our sales, technical and administration team and look forward to hearing from you again.


    Oksana Romanovska
    21 October 2018 06:35

    DEVIcomfort 150W/m² DTIR-150 10.0m² 1500W Underfloor Heating Mat

    happy about everything , will recommended

    View product


    Thank you for the 5 star service rating.


    Richard Smith, Cheshire
    10 October 2018 15:13

    DEVIcomfort 100W/m² DTIR-100 2.0m² 200W Underfloor Heating Mat

    Great product at a great price!

    View product

    Great service - very knowledgeable staff on the helpline - advised of exactly which item was compatible as a replacement for an obsolete stat, and prices are very competitive too. Also delivery was perfect as arranged. All in all excellent, and will definitely use again.


    Trusted Customer
    24 September 2018 22:20

    DEVImat 200W/m² DTIF-200 6.10m² 1220W Underfloor Heating Mat

    The best mat on the market.

    View product

    Excellent service quick and easy. Stock the best products at the best price will definitely order future products from them .Highly recommend them


    Martin Breen, Dublin, Ireland
    7 June 2018 11:33

    DEVIcomfort 100W/m² DTIR-100 3.0m² 300W Underfloor Heating Mat

    an easy choice for the floor i needed heated

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    My original query was answered very quickly and the follow up supply of goods was equally excellent. Great customer service.

    Fantastic, thank you for the great review of our service.


    Bruce Shearman
    24 May 2018 12:33

    DEVIcomfort 100W/m² DTIR-100 2.5m² 250W Underfloor Heating Mat

    Mat does not appear to be as sticky as a previous product

    View product

    Your service was quick and efficient. My concern was with the DEVI product information and installation information. I have previously fitted a DEVI mat however the installation information was minimal and no explanation given for the pack content. Fortunately I remembered most of the installation steps. The one that I didn't was answered by DEVI customer help. My point is that the product is good but the installation information is poor as is the online information. If DEVI ask you can feed back this information to them.



    Nick Hepher
    25 February 2018 07:17

    DEVIcomfort 150W/m² DTIR-150 3.0m² 450W Underfloor Heating Mat

    What’s not to like? Quality, price and delivery all good

    View product

    First class on price and delivery. Highly recommended

    Thank you for the excellent review and the fantastic recommendation, we appreciate it greatly.