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Electric Underfloor Heating For Concrete Floors

Shop all Electric Underfloor Heating

At Element Shop we stock Harmoni smartmat 150W which provides electric underfloor heating for concrete based floors. Available as both kits or individual mats, mix and match mat lengths to reach any size required.

VideosLifetime Warranty
Electric Underfloor Heating For Concrete Floors
Electric Underfloor Heating For Concrete Floors
Electric Underfloor Heating For Concrete Floors
Electric Underfloor Heating For Concrete Floors
Electric Underfloor Heating For Concrete Floors
Electric Underfloor Heating For Concrete Floors
Product CodeAreaMat lengthWattagePriceStockQty
Harmoni - SmartMat 150w/m² - 0.5m² 75w Underfloor Heating MatHMMAT150-0.5
QF #: 16252
0.5 m²
1 m
75 W
ex VATinc VAT
Area0.5 m²
Mat length1 m
Wattage75 W
Harmoni - SmartMat 150w/m² - 1.0m² 150w Underfloor Heating MatHMMAT150-1.0
QF #: 16253
1 m²
2 m
150 W
ex VATinc VAT
Area1 m²
Mat length2 m
Wattage150 W
Harmoni - SmartMat 150w/m² - 1.5m² 225w Underfloor Heating MatHMMAT150-1.5
QF #: 16254
1.5 m²
3 m
225 W
ex VATinc VAT
Area1.5 m²
Mat length3 m
Wattage225 W
Harmoni - SmartMat 150w/m² - 2.0m² 300w Underfloor Heating MatHMMAT150-2.0
QF #: 16255
2 m²
4 m
300 W
ex VATinc VAT
Area2 m²
Mat length4 m
Wattage300 W
Harmoni - SmartMat 150w/m² - 2.5m² 375w Underfloor Heating MatHMMAT150-2.5
QF #: 16256
2.5 m²
5 m
375 W
ex VATinc VAT
Area2.5 m²
Mat length5 m
Wattage375 W
Harmoni - SmartMat 150w/m² - 3.0m² 450w Underfloor Heating MatHMMAT150-3.0
QF #: 16257
3 m²
6 m
450 W
ex VATinc VAT
Area3 m²
Mat length6 m
Wattage450 W
Harmoni - SmartMat 150w/m² - 3.5m² 525w Underfloor Heating MatHMMAT150-3.5
QF #: 16258
3.5 m²
7 m
525 W
ex VATinc VAT
Area3.5 m²
Mat length7 m
Wattage525 W
Harmoni - SmartMat 150w/m² - 4.0m² 600w Underfloor Heating MatHMMAT150-4.0
QF #: 16259
4 m²
8 m
600 W
ex VATinc VAT
Area4 m²
Mat length8 m
Wattage600 W
Harmoni - SmartMat 150w/m² - 5.0m² 750w Underfloor Heating MatHMMAT150-5.0
QF #: 16260
5 m²
10 m
750 W
ex VATinc VAT
Area5 m²
Mat length10 m
Wattage750 W
Harmoni - SmartMat 150w/m² - 6.0m² 900w Underfloor Heating MatHMMAT150-6.0
QF #: 16261
6 m²
12 m
900 W
ex VATinc VAT
Area6 m²
Mat length12 m
Wattage900 W
Harmoni - SmartMat 150w/m² - 7.0m² 1050w Underfloor Heating MatHMMAT150-7.0
QF #: 16262
7 m²
14 m
1050 W
ex VATinc VAT
Area7 m²
Mat length14 m
Wattage1050 W
Harmoni - SmartMat 150w/m² - 8.0m² 1200w Underfloor Heating MatHMMAT150-8.0
QF #: 16263
8 m²
16 m
1200 W
ex VATinc VAT
Area8 m²
Mat length16 m
Wattage1200 W
Harmoni - SmartMat 150w/m² - 9.0m² 1350w Underfloor Heating MatHMMAT150-9.0
QF #: 16264
9 m²
18 m
1350 W
ex VATinc VAT
Area9 m²
Mat length18 m
Wattage1350 W
Harmoni - SmartMat 150w/m² - 10.0m² 1500w Underfloor Heating MatHMMAT150-10.0
QF #: 16265
10 m²
20 m
1500 W
ex VATinc VAT
Area10 m²
Mat length20 m
Wattage1500 W
Harmoni - SmartMat 150w/m² - 12.0m² 1800w Underfloor Heating MatHMMAT150-12.0
QF #: 16266
12 m²
24 m
1800 W
ex VATinc VAT
Area12 m²
Mat length24 m
Wattage1800 W
Harmoni - SmartMat 150w/m² - 13.0m² 1950w Underfloor Heating MatHMMAT150-13.0
QF #: 8926
13 m²
26 m
1950 W
ex VATinc VAT
Area13 m²
Mat length26 m
Wattage1950 W
Harmoni - SmartMat 150w/m² - 14.0m² 2100w Underfloor Heating MatHMMAT150-14.0
QF #: 8927
14 m²
28 m
2100 W
ex VATinc VAT
Area14 m²
Mat length28 m
Wattage2100 W
Harmoni - SmartMat 150w/m² - 15.0m² 2250w Underfloor Heating MatHMMAT150-15.0
QF #: 8928
15 m²
30 m
2250 W
ex VATinc VAT
Area15 m²
Mat length30 m
Wattage2250 W
Harmoni - SmartMat 150w/m² - 16.0m² 2400w Underfloor Heating MatHMMAT150-16.0
QF #: 8929
16 m²
32 m
2400 W
ex VATinc VAT
Area16 m²
Mat length32 m
Wattage2400 W
Harmoni - SmartMat 150w/m² - 17.0m² 2550w Underfloor Heating MatHMMAT150-17.0
QF #: 8930
17 m²
34 m
2550 W
ex VATinc VAT
Area17 m²
Mat length34 m
Wattage2550 W
Harmoni - SmartMat 150w/m² - 18.0m² 2700w Underfloor Heating MatHMMAT150-18.0
QF #: 8931
18 m²
36 m
2700 W
ex VATinc VAT
Area18 m²
Mat length36 m
Wattage2700 W
Harmoni - SmartMat 150w/m² - 19.0m² 2850w Underfloor Heating MatHMMAT150-19.0
QF #: 8932
19 m²
36 m
2700 W
ex VATinc VAT
Area19 m²
Mat length36 m
Wattage2700 W
Harmoni - SmartMat 150w/m² - 20.0m² 3000w Underfloor Heating MatHMMAT150-20.0
QF #: 8933
20 m²
40 m
3000 W
ex VATinc VAT
Area20 m²
Mat length40 m
Wattage3000 W
Harmoni - SmartMat 150w/m² - 22.0m² 3300w Underfloor Heating MatHMMAT150-22.0
QF #: 8934
22 m²
42 m
3000 W
ex VATinc VAT
Area22 m²
Mat length42 m
Wattage3000 W
Harmoni SmartMat 150w/m² - 23.0m² 3450w Underfloor Heating MatHMMAT150-23.0
QF #: 8935
23 m²
46 m
3450 W
ex VATinc VAT
Area23 m²
Mat length46 m
Wattage3450 W
Harmoni - SmartMat 150w/m² - 24.0m² 3600w Underfloor Heating MatHMMAT150-24.0
QF #: 8936
24 m²
48 m
3600 W
ex VATinc VAT
Area24 m²
Mat length48 m
Wattage3600 W
Harmoni Pro-E White Wi-Fi Thermostat - 16 AmpPRO-E-W-16
QF #: 22428
ex VATinc VAT
Harmoni Pro-E Black Wi-Fi Thermostat - 16 AmpPRO-E-B-16
QF #: 22430
ex VATinc VAT
Harmoni Touch-E White Wi-Fi Thermostat - 16 AmpTOUCH-W-16
QF #: 22432
ex VATinc VAT
Harmoni Touch-E Black Wi-Fi Thermostat - 16 AmpTOUCH-B-16
QF #: 22433
ex VATinc VAT
Harmoni 25 Programmable Thermostat140G0052
QF #: 8298
ex VATinc VAT

Need Help? Free Design Service

Call 01473 559079 or email us for a bespoke design service for your underfloor heating project – FREE

Electric Underfloor Heating on Concrete Floors

Our Harmoni smartmat 150W has been designed specifically for use on existing concrete floors. As concrete can get cold with the weather, it requires a slightly higher output than timber based floor. Providing an output of 150W/m², it provides an even amount or warmth across your floors. Whilst these are usually used on existing floors, they can also be used for new concrete floors as well. However, you may want to consider if electric is the right system for you to use if you are putting down new sub-floors. With new builds, they are often installed with wet underfloor heating as they are a lot easier to install when laying new floors and there can be cost savings over time. If you’re unsure which system would be best for you, get in touch with us and we’ll happily talk you through your choices.

You should also note that if you require underfloor heating for polished concrete or slabs, you would be better served using in-screed heating cables rather than heating mats.

Underfloor Heating Kits

Creating a kit couldn’t be easier, Simply choose which size mat you need, add thermostat, and then add the fixing kit and you have everything you’ll need for a successful installation. Mix and match different size mats to accommodate the size of your room or rooms and choose between a wide range of market leading thermostats for electric underfloor heating. The fixing kits includes high strength adhesive spray for sticking the mat in places where it may require some extra adhesive, flexible conduit cable for the floor probe, and duct tape for taping down any loose edges and fixing the conduit in place.

Types of Floor Finishes Used With This System

Our electric underfloor heating mats for concrete floors have been designed for use underneath floor tiles. This includes ceramic, marble, limestone & slate. Depending on your type of installation, you may need to insulate and/or screed the floor. If this is the case, we also offer a range of insulation boards for underfloor heating and self-levelling compound which is a screed used for levelling. If you are looking to lay laminate flooring or wood, please visit our heating foils as these are what you should use for that type of installation.

Our Range Of Products

Our mats are measured at 500mm wide, and lengths range between 1m and 32m in 0.5m or 1m increments. Each 1m length of matting covers an area of 0.5², so if you need to cover and area of 12m², you will need a 24m mat, 2 x 12m, or 3 x 8m lengths of mat.

Our mats have a self-adhesive mesh which sticks down to the floor and protects the cables. With an ultra-thin heating cable, and twin conductor heating cables you won’t need to worry about adding extra floor height as the cable is 3mm thick. They are suitable for all concrete floors that are using tiles for the floor covering and have an output of 150w/m². With a 100% aluminium earth sheath, an operating voltage of 230/240v and a 3m cold tail connection lead.

Lifetime Warranty

We are proud to offer a premium electric underfloor heating range that offers unbeatable value. All Harmoni mats, foils & cables are guaranteed against manufacturer defects for the lifetime of the initial floor covering. This means that they have a lifetime warranty plus an installation replacement warranty. All underfloor mats, foils and cables are safety approved products and have been verified with independent S Mark & Fimko. We offer a free design service and a fully detailed quotation, along with free next day delivery or local collection.

Installer Warranty

During the period between laying your electric heating mats and the next covering, accidents can happen where someone may step on and break a cable. It happens more than you may think which is why we offer an installer warranty. This guarantees that if you damage your Harmoni mat, foil or cable before the finished floor surface is installed, we will replace it with an equivalent product free of charge.

Why use Element Shop?

Since we started doing business more than 15 years ago, Element Shop has grown to become one of the UK's top suppliers of underfloor heating for both wet and electric systems. We continually broaden our product selection in response to consumer input, and we have created a product catalogue that is ideal for plumbers and electricians who install heating devices. All our items come with a minimum one-year warranty, but many of them come with longer warranties, some of which are lifetime warranties. No matter how much or how little you spend, we provide free next day delivery to much of the UK, and we also have a no questions asked 14-day return policy. If you decide to change your mind, just send back the item in its original packaging, and we'll give you your money back. Additionally, we provide a price match guarantee, which means we'll match any lower price for one of our products that you find anywhere.

If you’d like to find out more about our products, or would like to enquire about stock, you can call one of the team on 01473 559079 who will be on hand to help with your query.

Delivery Times

Most of our products are kept in stock, in our warehouse in Ipswich. This means we can offer free next day delivery to our customers. Each range and individual product, state their estimated delivery time during checkout. We deliver to most UK locations with free, next day delivery as standard. To discuss delivery details, call us on 01473 559079.

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Product reviews

4.8100% Positive (4 reviews)

Ratings based on data collected by third party reviewing platform.

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John Wood
28 November 2023 08:17

Very smart looking . Not fitted yet

Great service and helpful advice. The kit was packaged well and has clear instructions. Prompt delivery.

Thank you so much for your 5-star review! We will share this with the team to let them know to keep up the amazing work.


Jon Ellis, Huddersfield
11 November 2023 14:06

Good quality easy to use easy to install

All questions answered by phone, easy to use website showing stock availability
God prices and fast delivery

Thank you so much for taking the time to leave us a 5 star rating - it's much appreciated!


Louis Charalambous
15 June 2023 09:21

Connect to your app 2 rooms in one app.

Great fast delivery

Thanks so much for giving us your take on how we are doing. We're glad that customers like you are having a great experience at Heater Shop.


Ceramica tiling services, Nottingham
13 July 2019 22:23

Comes in the kit and looks good for the price

Had a few heat mats of these guys, and quite a few customers have gone direct now as well. Very good service, the staff are helpful and delivery is quick. This is the only place I get underfloor heating from now

Thank you very much for this really great feedback.