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Warmup Underfloor Heating Cable Kit

From £119.99
Now £119.99
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Warmup Underfloor Heating Cable Kit
From £119.99
Now £119.99

Next working day delivery

Order within hours minutes seconds

Speak to a heating expert

Call our expert team on 01268 567016

Warmup loose wire system provides the best flexibility of layout so are ideal for awkward shaped or smaller floor areas, they are usually installed beneath a tiled or stone floor finish but can be used beneath Vinyls when embedded within a suitable levelling compound.

Choose your cable system to cover around 95% of your open floor area.

You can also choose your thermostat from the thermostat choice menu.

Warm loose wire systems are 2mm in diameter, ultra-thin, dual-core heating element. The small cross-section of our element allows it to be installed in a matter of hours without raising floor levels.

There is no need to dig up the floor and no need to mix concrete. Simply fix the heating element to the subfloor, tile straight over and say goodbye to cold feet for good!

Please ensure all safety guidelines are adhered to during and after installation of this product.


  • Ultra-thin dual-core heating element wont raise floor levels
  • Toughest and thinnest wire you can buy: 2mm, multi-strand core, double-insulated using advanced fluoropolymers
  • ASTA BEAB approved heating element meets the highest safety standards
  • Quick installation Single connection lead for fewer steps
  • Available in both 120V and 240V
  • Approvals: ASTA BEAB Component, CERTIF, KEMA, GS
  • Lifetime warranty
  • Warmup Safety Net Installation guarantee
Heater construction Dual core earth screened cable
Operating voltage 220 - 240V, 50Hz
Cable thickness 2mm
Inner insulation ECTFE (advanced fluoropolymers)
Outer insulation ECTFE (Advanced Fluoropolymers)
Average output rating 150 W/m2
Cold tail length (connection lead) 3m
Approvals ASTA BEAB component, KEMA and GS
Area m2 Heaters required Spacing
1.5 - 1.8 DWS300 70
1.9 - 2.4 DWS300 90
2.5 - 2.7 DWS400 70
2.8 - 3.0 DWS400 80
3.1 - 3.4 DWS400 90
3.5 - 3.8 DWS600 70
3.9 - 4.1 DWS600 80
4.2 - 4.4 DWS600 90
4.5 - 5.0 DWS800 70
5.1 - 5.6 DWS800 80
5.7 - 5.9 DWS800 90
6.0 - 6.4 DWS400 + DWS600 80
6.5 - 6.9 DWS400 + DWS600 90
7.0 - 7.7 2 x DWS600 80
Area m2 Heaters required Spacing
7.8 - 8.4 2x DWS600 90
8.5 - 9.2 DWS600 + DWS800 80
9.3 - 9.9 DWS600 + DWS800 90
10.0 - 11.1 2 x DWS800 80
11.2 - 11.4 2 x DWS800 90
11.5 - 12.2 DWS400 + DWS600 + DWS800 80
12.3 - 12.9 DWS400 + DWS600 + DWS800 90
13.0 - 13.7 2 x DWS800 + DWS400 80
13.8 - 14.4 2 x DWS800 + DWS400 90
14.5 - 15.2 2 x DWS800 + DWS600 80
15.3 - 15.9 2 x DWS800 + DWS600 90
16.0 - 16.7 3 x DWS800 80
16.8 - 17.4 3 x DWS800 90

The Warmup Loose Wire System has been designed so that installation is quick and easy. However, as with all electrical underfloor heating systems, certain procedures must be followed. Ensure you have read all technical specifications and you are happy to fit Warmup Loose Wire Underfloor Heating to your room. To install your Warmup Underfloor Heating system follow these 4 steps. Please note that this is a summary.

  • Smooth, clean and dry the subfloor surface. Paint the floor with Warmup Primer (you do not need to use primer if installing on an insulated tile back board). The light green colour of the primer will change to a dark green once dry. Avoid traffic once primer is down.
  • Calculate in square metres the size of the area to be heated. Use the Sizing Guide (found in the back of the Installation Manual) to correctly fit your heating wire into the space provided. Layout the heating wire in parallel lines. Begin at the start point and in U shapes go to the furthest point. Using the wire spacing markings as tape down points, secure the heating wire to the floor with adhesive tape. Once completed, tape down the entire length of the heating wire, positioning the tape centrally over the wire.
  • Follow the instructions supplied with your thermostat. Your underfloor heating system will not function without a correctly installed thermostat.
  • Check if the heating wire is fully taped and secured. Grout the floor as soon as possible as per the manufacturer's' instructions. Tile as normal, taking care not to damage or dislodge the heating wire.

The heater can be installed without the need for specialist tools or expertise (in accordance with local building code). It is important, however, that the Warmup Thermostat be connected by a qualified electrician.

Let our experts help you

Product Question? Need help placing an order?

Our customer support is available Monday to Friday 7am-6pm.

Call us on 01268 567 016

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Free delivery on all orders

At The Underfloor Heating Store, we strive to make every step of your order as easy and convenient as possible, from finding the right underfloor heating setup to best suit you to taking delivery of your system the very next day.

We're proud to offer a range of delivery options to suit you, including free delivery on all of our orders or next working day delivery for a fixed price of £4.99

  • 2-3 working days delivery - FREE (Order before 4pm Monday - Friday)
  • Next working day - £4.99 (Order before 4pm Monday - Friday, applies to orders over £19.99)
  • Next working day before 10.30am - £14.99 (Order before 4pm Monday - Friday)
  • Saturday delivery - £29.99 (Order before 4pm Monday - Friday)

Explore our full delivery policy

30 days returns policy

At The Underfloor Heating Store, our customers have 30 days to upgrade, replace or refund their orders.


At The Underfloor Heating Store, we want to ensure you are happy with every purchase you make. If you have any issues with your chosen product, whether damaged, faulty or simply an unwanted item, you can simply return what you bought for a refund. Learn more.


We take great care in the delivery of all of our products, however, in the event of your delivery arriving damaged or if you notice a manufacturing fault of any kind within 48 hours of delivery, you're within your rights to a replacement. Learn more.


Within 14 days of purchasing from us, you are eligible to upgrade if you deem you want something a little better. Simply send it back to us brand new and we'll happily assist you with an upgrade to your order. Learn more.

Lifetime warranty

At The Underfloor Heating Store, we are committed to providing our customers with high-quality products and outstanding customer service. That's why we offer a comprehensive warranty on all of our underfloor heating products, with a lifetime warranty for our ProWarm range of products.

Our warranties are designed to give you peace of mind and ensure that your underfloor heating system operates reliably for years to come.

Find out more

Price match promise

At The Underfloor Heating Store, our main priority is customer satisfaction. To cement our commitment to this, we are proud to offer our Underfloor Heating Price Match Promise. If you find a lower price on an identical product anywhere else, we will match it – guaranteed!

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