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Cable Size Calculator

Our electric underfloor heating calculator takes the guesswork out of buying your heating cables. Simply provide the free floor area of your room and we’ll subtract any fitting space required to work out the cable needed. If you do not know the free floor area, you can calculate from your room’s dimensions and also deduct the area for fixed furniture such as baths, toilets, cabinets and kitchen islands — if you provide the area of the unheated space, our calculator will deduct these, as well as the fitting space and suggest cables to size. Please note, the maximum free floor area for this calculator is 30m².

If you need assistance, call our experts on 01244 740259 or if you prefer please email us.


Diagram illustrating 'Free Floor Area', which is the total room area excluding fixed objects like baths and kitchen islands.
Diagram illustrating 'Room Dimensions' with width and length clearly marked, showing how to calculate total room area.
Diagram illustrating 'Deduct Unheated Area', showing how to subtract space occupied by fixed furniture like toilets or sinks from the total room area.

FREE DELIVERY ON ALL PRODUCTS. The estimated dispatch timescale for underfloor heating is 1 working day, while for other products, it is 1–3 working days.*

150W/m² Heat My Home Electric Underfloor Heating Cable
150W/m² Heat My Home Electric Underfloor Heating Cable
150W/m² Heat My Home Electric Underfloor Heating Cable
36% OFF
  • Load image into Gallery viewer, 150W/m² Heat My Home Electric Underfloor Heating Cable
  • Load image into Gallery viewer, 150W/m² Heat My Home Electric Underfloor Heating Cable
  • Load image into Gallery viewer, 150W/m² Heat My Home Electric Underfloor Heating Cable

150W/m² Heat My Home Electric Underfloor Heating Cable
Heat My Home
£29.10
£29.10
£45.60
Contact Us
Incl. VAT
IN STOCK – FREE DELIVERY
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This product is dispatched on a FREE next working day express service. If ordered together with an item that has a longer dispatch time, the longer of the two dispatch times will apply. This longer dispatch time is typically no more than 2–3 working days. We’ll endeavour to notify you if it’s expected to be different.

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VIEW DESCRIPTION

The underfloor heating kit I ordered was easy to install and works perfectly. Excellent value and customer service throughout the whole process.

Rosario S

Ordering is easy and efficient, their delivery is very quick, and they have so many ranges and sizes. What I like about their product is that it covers the area very well rather than have cold spots like some old versions do.

Peter

Responsive customer service and good product.

SP
Fast Delivery
Free & Fast Delivery
FREE DELIVERY ON ALL PRODUCTS. The estimated despatch timescale for underfloor heating is 1 working day, while for other products, it is 1–3 working days.
Great Prices
Low Prices
Our entire product range is competitively priced. And for larger orders, we offer exclusive volume discounts – the more you buy, the more you save.
Quality Brands
Quality Brands
We are committed to offering you the best brands in the industry, providing high-quality, reliable products that deliver outstanding performance and long-term value.
Expert Advice
Expert Advice
We provide expert technical advice tailored to your needs. Our team is here to guide you every step of the way, ensuring you select the right products and achieve optimal performance.

Description

Product Description

Heat My Home 3.5mm Electric Underfloor Heating Cable an efficient and budget-friendly alternative to traditional heating mats. Our solution for all your floor heating requirements comes in the form of a flexible, ultra-thin, and universally compatible electric underfloor heating cable, measuring just 3.5mm in thickness. Designed with a focus on energy efficiency and cost-effectiveness, this adaptable heating cable offers the convenience of floor warming or the capability to serve as a comprehensive room heating system.

One standout feature of this electric underfloor heating cable is its exceptional adaptability and user-friendly installation process. Thanks to its remarkable flexibility, it easily conforms to various contours, making it an excellent choice for compact or complex spaces.

Specifications

Product Specifications

General Construction Dual conductor wire with earth
Supply Voltage 240V - 50Hz
Power Output 14W/m
Cable Dimensions 3.5mm x 8.4m to 147m
Approvals UKCA and CE marked
Wire Thickness 3.5mm
Approved in accordance with EN 60335-2-96
IP Rating IPX7
Thermal Conductor 2 x high-temperature TPE
Outer Insulation Polyolefin
Coldtail Lead 2.5m double insulated cable
Earth Protection 100% aluminium earth shield
Reinforcement Materials Fibreglass wire
Resistance 454 ohm to 26 ohm
Wattage 130W - 2190W
Wattage 150W/sqm

Downloads & Videos

Mirror Demisters

Installation Documents and Videos

Mirror Demista Installation Video

Demista New Instructions

All mirror demisters starting 7015
Demista-150-wide-data-sheet-230V1

All mirror demisters starting 7020
Demista-200-wide-data-sheet-230V1

All mirror demisters starting 7030
Demista-300-wide-data-sheet-230V1

All mirror demisters starting 7040
Demista-400-wide-data-sheet-230V1

All mirror demisters starting 7050
Demista-500-wide-data-sheet-230V1

All mirror demisters starting 7060
Demista-600-wide-data-sheet-230V1

All mirror demisters starting 7070
Demista-700-wide-data-sheet-230V1

All mirror demisters starting 75
Demista 12V data sheet

Ice & Snow Melting Products

All ACC-FRO codes

PipeGuard Factsheet

PipeGuard Instruction PDF

Both ICE-50W codes

ICE-50W CABLES

FRO-10A-STAT

FRO-10A-STAT Instructions

FRO-16A-STAT

FRO-16A-STAT Instructions

FRO-48A-STAT

FRO-48A-STAT INSTRUCTIONS

FRO-48A-STAT User Manual

Both FRO-GRO-SENS sensors

FRO-GRO-SENS Datasheet

FRO-GRO-SENS Manual

Underfloor Heating Products

Thermostats - HC90-BLK-WIFI and HC90-WHT-WIFI

HC90 Thermostat Factsheet

HC90 Thermostat Instructions

Thermostat - HCT-567-HC71

HC71 Thermostat Factsheet

Heating Cables - HMHCAB3.5-XXXX

HMHCAB3.5 Underfloor Heating Cables Factsheet

HMHCAB3.5 Underfloor Heating Cables Instructions

Heating Mats - HMHMAT160W-XXXX

HMHMAT160W Underfloor Heating Mats Factsheet

HMHMAT160W Underfloor Heating Mats Instructions

Heating Mats - PKM-160-XXXX

PKM-160 160W Underfloor Heating Mat Factsheet

PKM-160 160W Underfloor Heating Mat Instructions

Thermal Insulation Boards - TTB-010-6PCK

Insulation Boards Product Factsheet

Insulation Boards Instructions

Product Description

Heat My Home 3.5mm Electric Underfloor Heating Cable an efficient and budget-friendly alternative to traditional heating mats. Our solution for all your floor heating requirements comes in the form of a flexible, ultra-thin, and universally compatible electric underfloor heating cable, measuring just 3.5mm in thickness. Designed with a focus on energy efficiency and cost-effectiveness, this adaptable heating cable offers the convenience of floor warming or the capability to serve as a comprehensive room heating system.

One standout feature of this electric underfloor heating cable is its exceptional adaptability and user-friendly installation process. Thanks to its remarkable flexibility, it easily conforms to various contours, making it an excellent choice for compact or complex spaces.

Product Specifications

General Construction Dual conductor wire with earth
Supply Voltage 240V - 50Hz
Power Output 14W/m
Cable Dimensions 3.5mm x 8.4m to 147m
Approvals UKCA and CE marked
Wire Thickness 3.5mm
Approved in accordance with EN 60335-2-96
IP Rating IPX7
Thermal Conductor 2 x high-temperature TPE
Outer Insulation Polyolefin
Coldtail Lead 2.5m double insulated cable
Earth Protection 100% aluminium earth shield
Reinforcement Materials Fibreglass wire
Resistance 454 ohm to 26 ohm
Wattage 130W - 2190W
Wattage 150W/sqm

Underfloor Heating Products

Thermostats - HC90-BLK-WIFI and HC90-WHT-WIFI

HC90 Thermostat Factsheet

HC90 Thermostat Instructions

Thermostat - HCT-567-HC71

HC71 Thermostat Factsheet

Heating Cables - HMHCAB3.5-XXXX

HMHCAB3.5 Underfloor Heating Cables Factsheet

HMHCAB3.5 Underfloor Heating Cables Instructions

Heating Mats - HMHMAT160W-XXXX

HMHMAT160W Underfloor Heating Mats Factsheet

HMHMAT160W Underfloor Heating Mats Instructions

Heating Mats - PKM-160-XXXX

PKM-160 160W Underfloor Heating Mat Factsheet

PKM-160 160W Underfloor Heating Mat Instructions

Thermal Insulation Boards - TTB-010-6PCK

Insulation Boards Product Factsheet

Insulation Boards Instructions

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