Heating Cables

Heating cables

Indoor heating cables are used for a variety of applications, including indoor comfort floor heating and total heating, both for small houses as well as large commercial buildings. Heating cables are mostly used in connection with new build or larger renovation projects. Heating cables used in floor constructions are serial resistive cables, preferably twin conductor for easier installation. A range of single conductor cables are also available.

Check our application manuals via the links below to get the best recommendations for design and installation of floor heating systems.

DEVI indoor application manual
Danfoss indoor application manual

Benefits of electric underfloor heating

A comfortable ambient temperature and quick response time are just a couple of the benefits electric heating offers. Learn more about these and other benefits of electric heating.

Features and benefits using heating cables

Easy to install, flexible cable

Maximum performance and fast installation

Fast reaction time

Safe and robust

Invisible heat source

Ease of installation

Long life-time with up to 20-year full warranty

Product catalog

80 years of experience resulting in powerful products built with the highest standards of quality control.

Open product catalog

Product range

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DEVIflex™

DEVIflex™ is an extremely high quality, 360°, fully screened, twin conductor cable with a tough non-UV stable outer sheath. Its round profile and robust construction ensures a fast, simple and safe installation.
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ECbasic

ECbasic is a single conductor cable of a high quality, with a non UV stable outer sheath and braided screen. Due to its round profile and robust construction it enables a fast, simple and safe installation in different applications.
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ECflex

ECflex is 360° fully screened twin conductor cable with a tough outer sheath (non UV stable) of an extremely high quality. It enables a fast, simple and safe installation due to its round profile and robust construction.
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DEVIcomfort™

DEVIcomfort™ is an extremely high quality, 360° fully screened, twin conductor cable with a tough red PVC outer sheath (non UV stable). Its round profile, robust construction and low height ensures a fast, simple and safe installation which is perfect for renovating existing floors. The cold lead has solid conductors ensuring fast installation.
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DEVIbasic™

DEVIbasic™ is a high-quality, braided screen, single conductor cable with a non-UV stable outer sheath. Its round profile and robust construction ensure a fast, simple and safe installation.

Related products

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Analogue Thermostats

Analogue thermostats are electronic control units allowing setting the heating system type and adjustment of control parameters.
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Digital Thermostats

Digital controllers have the unique features allowing you to reduce energy waste. Some thermostats are fitted with Wi-Fi allowing remote control of heating systems via mobile application.
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Heating Mats

The heating mats are used for installation in a thin layer of tile adhesive, self-leveling mixture, or similar. The standard minimum thickness of the floor layer is 5-8 mm while the thickness of electric heating mat is 3–4.5 mm. This minimizes the floor level increase. Electric heating mats consist of a thin cable securely fixed on self-adhesive glass-fiber mesh, usually of 50 cm width. Thin heating mats are manufactured as ready-made heating sections with a specific area (i.e. 0.5, 1, 1.5 … 12 m²) including a power supply cable (cold lead) and hermetically sealed connections.

Relevant accessories

Find relevant accessories by following this link

Accessories in Product Store

Elements of electric heating cable

1. Heating cable

2. Suply cable

3. Connecting muff

4. Connection to power supply

5. End of the heating cable

Electric heating cable construction

1. Outer PVC coating

2. Protective screen foil (Aluminium)

3. Protective conductor

4. Internal insulation (XLPE)

5. Heating element (resistance thread)

Videos

Best practices for DEVIflex electric heating cable installation

Find out how to get the most out of your electric heating cable system and set a comfortable floor surface temperature. Learn about the optimal cable to cable distance, the right output per square meter and the ideal depth for cable installation.

Comfort floor heating with ECflex heating cables

Heating cables are mostly used in connection with new building or with larger renovation projects, where a completely new floor construction is laid out.

Step-by-step installation of electric heating cables

See how to install heating cables with temperature sensors and find out how to calculate:

the heated floor area,
the appropriate C-C distance, and
the fixing strip length.

Electric heating knowledge on YouTube

You can see all our videos about Electric Heating on a dedicated playlist on YouTube. Follow the link below.

Go to the Electric Heating playlist on YouTube

Documents

Documents
Type	Name	Language	Valid for	Updated	Download	File type
Application guide	Danfoss Indoor Cable Floor Heating Systems Application manual	English	Multiple	20 Aug, 2018	3.6 MB	.pdf
Catalog	Danfoss Product catalogue	English	Multiple		20.8 MB	.pdf
Application guide	DEVI Indoor Application manual	Russian	Kazakhstan	15 Sep, 2020	21.2 MB	.pdf
Application guide	DEVI Indoor Application manual	Romanian, Moldavian, Moldovan	Romania	26 May, 2022	21.2 MB	.pdf
Application guide	DEVI Indoor Application manual	Danish	Denmark	03 Jun, 2021	4.8 MB	.pdf
Application guide	DEVI Indoor Application manual	Swedish	Sweden	22 Jun, 2022	20.8 MB	.pdf
Application guide	DEVI Indoor Application manual	English	Multiple	04 Nov, 2016	23.6 MB	.pdf
Catalog	DEVI Product Catalogue	Finnish	Finland	24 Jun, 2025	13.8 MB	.pdf
Catalog	DEVI Product Catalogue	Italian	Italy	13 Jun, 2025	29.3 MB	.pdf
Catalog	DEVI Product Catalogue	English	Multiple	09 Apr, 2025	29.5 MB	.pdf
Catalog	DEVI Product Catalogue	Norwegian Bokmål	Norway	28 Jun, 2022	13.6 MB	.pdf
Catalog	DEVI Product Catalogue	Ukrainian	Ukraine	16 Jan, 2025	13.0 MB	.pdf
Catalog	DEVI Product Catalogue	German	Austria	20 Jan, 2025	6.0 MB	.pdf
Data sheet	DEVIbasic™ 20S - 230 V & 400 V	English	Multiple	26 Mar, 2025	266.7 KB	.pdf
Data sheet	DEVIbasic™ 20S (DSIG)	Ukrainian	Ukraine	24 Dec, 2021	64.5 KB	.pdf
Data sheet	DEVIbasic™ 20S (DSIG) - 230V	French	France	03 Oct, 2024	231.4 KB	.pdf
Data sheet	DEVIcomfort™ 10T	English	Multiple	26 Mar, 2025	253.7 KB	.pdf
Data sheet	DEVIcomfort™ 10T (DTIR)	Danish	Denmark	12 Jul, 2023	203.6 KB	.pdf
Data sheet	DEVIcomfort™ 10T (DTIR)	French	France	03 Oct, 2024	217.7 KB	.pdf
Data sheet	DEVIcomfort™ 10T (DTIR)	German	Germany	29 Oct, 2024	218.2 KB	.pdf
Data sheet	DEVIflex 10T/18T	German	Multiple	18 Mar, 2021	357.5 KB	.pdf
Data sheet	DEVIflex™ 10T	English	Multiple	26 Mar, 2025	252.5 KB	.pdf
Data sheet	DEVIflex™ 10T	Polish	Poland	17 Jan, 2020	70.2 KB	.pdf
Data sheet	DEVIflex™ 10T (DTIP)	Slovenian	Slovenia	05 Sep, 2013	150.7 KB	.pdf
Data sheet	DEVIflex™ 10T (DTIP)	Swedish	Sweden	05 Sep, 2013	151.1 KB	.pdf
Data sheet	DEVIflex™ 10T (DTIP)	Russian	Central Asia Unit	30 Aug, 2019	450.8 KB	.pdf
Data sheet	DEVIflex™ 10T (DTIP)	Hungarian	Hungary	05 Sep, 2013	153.2 KB	.pdf
Data sheet	DEVIflex™ 10T (DTIP)	Lithuanian	Lithuania	05 Sep, 2013	151.1 KB	.pdf
Data sheet	DEVIflex™ 10T (DTIP)	Slovak	Slovakia	05 Sep, 2013	152.3 KB	.pdf
Data sheet	DEVIflex™ 10T (DTIP)	Latvian	Latvia	05 Sep, 2013	151.4 KB	.pdf
Data sheet	DEVIflex™ 10T (DTIP)	Finnish	Finland	05 Sep, 2013	150.5 KB	.pdf
Data sheet	DEVIflex™ 10T (DTIP)	Croatian	Croatia	05 Sep, 2013	151.2 KB	.pdf
Data sheet	DEVIflex™ 10T (DTIP)	Portuguese	Portugal	05 Sep, 2013	151.8 KB	.pdf
Data sheet	DEVIflex™ 10T (DTIP)	French	France	03 Oct, 2024	240.5 KB	.pdf
Data sheet	DEVIflex™ 10T (DTIP)	Turkish	Turkey	05 Sep, 2013	152.3 KB	.pdf
Data sheet	DEVIflex™ 10T (DTIP)	Serbian (RS)	Serbia	05 Sep, 2013	151.6 KB	.pdf
Data sheet	DEVIflex™ 10T (DTIP)	Romanian, Moldavian, Moldovan	Romania	05 Sep, 2013	151.3 KB	.pdf
Data sheet	DEVIflex™ 10T (DTIP)	Kazakh	Kazakhstan	05 Sep, 2013	211.3 KB	.pdf
Data sheet	DEVIflex™ 10T (DTIP)	Spanish, Castilian	Spain	05 Sep, 2013	151.4 KB	.pdf
Data sheet	DEVIflex™ 10T (DTIP)	Bulgarian	Bulgaria	30 Aug, 2013	156.0 KB	.pdf
Data sheet	DEVIflex™ 10T (DTIP)	Ukrainian	Ukraine	24 Dec, 2021	69.0 KB	.pdf
Data sheet	DEVIflex™ 10T (DTIP)	Czech	Czech Republic	05 Sep, 2013	153.4 KB	.pdf
Data sheet	DEVIflex™ 10T (DTIP)	Estonian	Estonia	05 Sep, 2013	148.2 KB	.pdf
Data sheet	DEVIflex™ 10T (DTIP)	Danish	Denmark	19 Oct, 2022	216.9 KB	.pdf
Data sheet	DEVIflex™ 10T (DTIP)	Norwegian Bokmål	Norway	21 Mar, 2024	165.4 KB	.pdf
Data sheet	DEVIflex™ 18T	Polish	Poland	17 Jan, 2020	68.9 KB	.pdf
Data sheet	DEVIflex™ 18T	Danish	Denmark	19 Oct, 2022	210.3 KB	.pdf
Data sheet	DEVIflex™ 18T	English	Multiple	26 Mar, 2025	252.5 KB	.pdf
Data sheet	DEVIflex™ 18T (DTIP)	Slovak	Slovakia	05 Sep, 2013	151.6 KB	.pdf
Data sheet	DEVIflex™ 18T (DTIP)	Serbian (RS)	Serbia	05 Sep, 2013	150.8 KB	.pdf
Data sheet	DEVIflex™ 18T (DTIP)	Slovenian	Slovenia	05 Sep, 2013	149.8 KB	.pdf
Data sheet	DEVIflex™ 18T (DTIP)	Lithuanian	Lithuania	05 Sep, 2013	150.4 KB	.pdf
Data sheet	DEVIflex™ 18T (DTIP)	Portuguese	Portugal	05 Sep, 2013	150.9 KB	.pdf
Data sheet	DEVIflex™ 18T (DTIP)	Romanian, Moldavian, Moldovan	Romania	05 Sep, 2013	150.4 KB	.pdf
Data sheet	DEVIflex™ 18T (DTIP)	Norwegian Bokmål	Norway	05 Sep, 2013	149.5 KB	.pdf
Data sheet	DEVIflex™ 18T (DTIP)	Ukrainian	Ukraine	24 Dec, 2021	63.9 KB	.pdf
Data sheet	DEVIflex™ 18T (DTIP)	Spanish, Castilian	Spain	05 Sep, 2013	150.5 KB	.pdf
Data sheet	DEVIflex™ 18T (DTIP)	Hungarian	Hungary	05 Sep, 2013	152.4 KB	.pdf
Data sheet	DEVIflex™ 18T (DTIP)	French	France	03 Oct, 2024	217.3 KB	.pdf
Data sheet	DEVIflex™ 18T (DTIP)	Kazakh	Kazakhstan	05 Sep, 2013	210.6 KB	.pdf
Data sheet	DEVIflex™ 18T (DTIP)	Turkish	Turkey	05 Sep, 2013	151.6 KB	.pdf
Data sheet	DEVIflex™ 18T (DTIP)	Croatian	Croatia	05 Sep, 2013	150.4 KB	.pdf
Data sheet	DEVIflex™ 18T (DTIP)	Latvian	Latvia	05 Sep, 2013	150.5 KB	.pdf
Data sheet	DEVIflex™ 18T (DTIP)	Czech	Czech Republic	05 Sep, 2013	152.8 KB	.pdf
Data sheet	DEVIflex™ 18T (DTIP)	Bulgarian	Bulgaria	30 Aug, 2013	155.3 KB	.pdf
Data sheet	DEVIflex™ 18T (DTIP)	Finnish	Finland	05 Sep, 2013	149.7 KB	.pdf
Data sheet	DEVIflex™ 18T (DTIP)	Estonian	Estonia	05 Sep, 2013	149.7 KB	.pdf
Data sheet	DEVIflex™ 6T	English	Multiple	26 Mar, 2025	244.7 KB	.pdf
Data sheet	DEVIflex™ 6T	Polish	Poland	10 Jan, 2020	67.9 KB	.pdf
Data sheet	DEVIflex™ 6T (DTIP)	Norwegian Bokmål	Norway	21 Mar, 2024	164.3 KB	.pdf
Data sheet	DEVIflex™ 6T (DTIP)	Serbian (RS)	Serbia	04 Sep, 2013	150.6 KB	.pdf
Data sheet	DEVIflex™ 6T (DTIP)	French	France	03 Oct, 2024	231.1 KB	.pdf
Data sheet	DEVIflex™ 6T (DTIP)	Slovak	Slovakia	04 Sep, 2013	151.4 KB	.pdf
Data sheet	DEVIflex™ 6T (DTIP)	Russian	Central Asia Unit	04 Sep, 2013	154.0 KB	.pdf
Data sheet	DEVIflex™ 6T (DTIP)	Croatian	Croatia	04 Sep, 2013	150.1 KB	.pdf
Data sheet	DEVIflex™ 6T (DTIP)	Ukrainian	Ukraine	24 Dec, 2021	64.1 KB	.pdf
Data sheet	DEVIflex™ 6T (DTIP)	Danish	Denmark	19 Oct, 2022	208.6 KB	.pdf
Data sheet	DEVIflex™ 6T (DTIP)	Portuguese	Portugal	04 Sep, 2013	150.9 KB	.pdf
Data sheet	DEVIflex™ 6T (DTIP)	Swedish	Sweden	04 Sep, 2013	150.1 KB	.pdf
Data sheet	DEVIflex™ 6T (DTIP)	Spanish, Castilian	Spain	04 Sep, 2013	150.4 KB	.pdf
Data sheet	DEVIflex™ 6T (DTIP)	Kazakh	Kazakhstan	04 Sep, 2013	225.7 KB	.pdf
Data sheet	DEVIflex™ 6T (DTIP)	Finnish	Finland	05 Sep, 2013	149.7 KB	.pdf
Data sheet	DEVIflex™ 6T (DTIP)	Latvian	Latvia	04 Sep, 2013	150.4 KB	.pdf
Data sheet	DEVIflex™ 6T (DTIP)	Lithuanian	Lithuania	04 Sep, 2013	150.2 KB	.pdf
Data sheet	DEVIflex™ 6T (DTIP)	Romanian, Moldavian, Moldovan	Romania	04 Sep, 2013	150.4 KB	.pdf
Data sheet	DEVIflex™ 6T (DTIP)	Slovenian	Slovenia	04 Sep, 2013	149.8 KB	.pdf
Data sheet	DEVIflex™ 6T (DTIP)	Hungarian	Hungary	04 Sep, 2013	152.0 KB	.pdf
Data sheet	DEVIflex™ 6T (DTIP)	Czech	Czech Republic	04 Sep, 2013	153.3 KB	.pdf
Data sheet	DEVIflex™ 6T (DTIP)	Estonian	Estonia	04 Sep, 2013	146.1 KB	.pdf
Data sheet	DEVIflex™ 6T (DTIP)	Bulgarian	Bulgaria	30 Aug, 2013	154.2 KB	.pdf
Data sheet	DEVIflex™ 6T (DTIP)	Turkish	Turkey	04 Sep, 2013	151.5 KB	.pdf
Data sheet	ECflex 6T	English	Multiple	23 Jul, 2020	438.2 KB	.pdf
Data sheet	ECflex™ 10T (EFTCP)	Romanian, Moldavian, Moldovan	Romania	24 Sep, 2013	212.9 KB	.pdf
Data sheet	ECflex™ 10T (EFTCP)	English	Multiple	17 Jul, 2023	448.8 KB	.pdf
Data sheet	ECflex™ 10T (EFTCP)	Swedish	Sweden	25 Jun, 2015	713.6 KB	.pdf
Data sheet	ECflex™ 10T (EFTCP)	Chinese (CN)	China	05 Sep, 2013	477.5 KB	.pdf
Data sheet	ECflex™ 10T (EFTCP)	Dutch, Flemish	Netherlands	05 Sep, 2013	198.8 KB	.pdf
Data sheet	ECflex™ 18T (EFTCP)	English	Multiple	17 Jul, 2023	378.4 KB	.pdf
Data sheet	ECflex™ 18T (EFTCP)	Chinese (CN)	China	05 Sep, 2013	324.9 KB	.pdf
Data sheet	ECflex™ 18T (EFTCP)	Dutch, Flemish	Netherlands	05 Sep, 2013	199.3 KB	.pdf
Data sheet	ECflex™ 18T (EFTCP)	Romanian, Moldavian, Moldovan	Romania	24 Sep, 2013	213.5 KB	.pdf
Data sheet	ECflex™ 20T (EFTCP)	Romanian, Moldavian, Moldovan	Romania	24 Sep, 2013	296.7 KB	.pdf
Data sheet	ECflex™ 20T (EFTCP)	English	Multiple	17 Jul, 2023	387.2 KB	.pdf
Data sheet	ECflex™ 20T (EFTCP)	Dutch, Flemish	Netherlands	05 Sep, 2013	199.1 KB	.pdf
Data sheet	ECflex™ 20T (EFTCP)	Chinese (CN)	China	05 Sep, 2013	326.5 KB	.pdf

Tools and apps

EH Plugin for AutoCAD

The Plugin supports your engineering and design journey by making your work faster due to simple functionalities in calculating all lengths, dimensions and product data of cables and mats. It covers all applications within Electric Heating projects: Electric floor heating, Ice & Snow melting systems, Pipe tracing, Cold stores, Sport fields, Vineyards etc.
By utilizing Plugin, you will reduce design time for the project, provide all necessary information for installers in HTML/PDF format: BoM, resistance value check list, warranty list format. It means all project information can be consolidated in one file.

Plugin can be used with AutoCAD 2017-2023.

Heat Selector

The Danfoss Heat Selector is a best-in-class online selection tool that optimizes planning process for heating application experts. The Heat Selector saves time in calculation for product selection and guides you to the recommended product mix for the application at hand. At the same time, the Heat Selector provides you with easy access to all required documentation.

80 years of energy efficient and environmentally friendly electric heating innovation

FAQ

My electric heating cable has been damaged/broken. Can I fix it?

Yes, all cables can be repaired. Electric heating offers a comprehensive and accurate fault (location) finding service. Contact your electrical installer for more details.

Can I extend the cold tails/sensor cable?

Cold tails can be extended based on wire length, specific output, cross sections, but it needs a separate calculation. Please contact your local technical support.

In the case of a broken cold lead an equal length of the same cross section and type cold lead can be used as a replacement when mounted by authorized personnel.

Sensor cable can be extended up to 100 m without contacting local support, using the same cross sections of wires (e.g. 0,75 mm2). For longer lengths please contact local technical support.

What is the maximum floor finish thickness I can have with a thin heating mat DEVIflex™ / ECflex heating cables?

This will depend upon the finish specified. For timber surfaces: 20mm for soft wood; 30mm for hard wood; most wood laminates are OK, but may need to be treated on merit. Talk to your floor covering supplier. Most vinyl floor coverings are suitable as long as you adhere to the manufacturer’s temperature limits and the elements are encased within the floor or a surface screed/FLC. Most carpets and underlays are suitable.

What type of power supply do I need?

This will depend upon the area being heated and the density of electric heating cable installed. Typically, we install at approx. 140 to 150 W/m² of heated floor area. Contact an installer recommended by DEVI / Danfoss Electric Heating for advice.

Is my underfloor heating suitable for use underneath carpets?

Yes, provided the cables are first covered with latex floor leveling compound, and the carpet used with a floor heating system is certified, approved, and confirmed by its manufacturer.

DOs and DON’Ts for Indoor Electric Heating

Electric Heating is an energy-efficient and environmentally friendly floor heating solution. You can use it for either newly constructed or renovated homes.

At Danfoss, it is important for us to deliver high-quality products with long-lasting effects. Should you, against all expectations, experience a problem with your product, Danfoss offers a warranty for electric heating products valid from the date of purchase that was no later than 2 years from production date.

Depending on the product, the product guarantee is valid for two years, five years, or twenty years.

Product warranty covers costs for:

product replacement with a new comparable product or repair of the product
transportation costs

Warranty terms

How to register for an electric heating warranty

Learn how to properly check cables or mats, do a resistance test and take all the necessary steps to get a warranty.

Learning

Visit our Learning Center

Danfoss offers online training materials for technicians and designers working with electric heating. There are 3 e-lessons available free and on-demand through Danfoss Learning portal. For more information, register in our support section by following the link or find the overview of available relevant trainings in the table below.

Case stories

Romantic surroundings in Lapland multiplied by comfort of electric heating.

40 igloos - Aurora cabins – are located in the wintry forest. They are glass-roofed so that guests can wrap up in a blanket and enjoy the breathtaking views of the Milky Way, the North star and the Northern lights.

Electric Floor Heating Timber Building NO

Electric heating in the world’s tallest timber building in Norway

Officially the world's tallest timber building at 85.4 m (280 ft) tall, Mjøstårnet translates as “the tower of lake Mjøsa”. The building is named after Norway’s biggest lake, which it is located beside.

Related applications

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Cold rooms

Danfoss solutions for cold rooms help keep the food fresh and safe for consumption and therefore contribute to reducing food loss and waste.
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Condition monitoring of HVAC/R systems

In air flow and indoor air quality-related applications, condition monitoring functionality improves system uptime and competitiveness by preventing issues before they occur.
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Electric floor heating

Electric underfloor heating for all types of floors

Electric heating is an energy-efficient and environmentally friendly floor heating solution. It is flexible for new build homes and renovations for both wet and dry installation.