Electric Floor Heating – old


Electric underfloor heating works excellently under hard floor surfaces, without taking up any valuable floor space.

One of the biggest advantages of floor heating for bathrooms is that heat is not lost in the exhaust air, like it is with convection heating. Electric floor heating also reduces the amount of travelling dust particles, which is a great relief to allergy and asthma sufferers.

Our Thermostats allow you to heat specific rooms independently and they can be programmed according to your lifestyle needs. Comfort isn’t the only reason to choose electric underfloor heating. Electric floor heating also offers flexibility, durability and minimal energy consumption, along with a warranty that is second to none.

Features & Benefits


Electric floor heating is ideal for bathrooms, ensuites and laundry rooms. It works amazingly under floor coverings such as marble, stone, slate and all varieties of tiles. It’s also fabulous under carpet and timber floors. Please note that if used under carpet, cables must be laid in a sand and cement bed or levelling screed.


The installation of an electric floor heating system is generally straight forward, although the level of complexity can vary depending on the system. It is important that care is taken during installation to avoid cutting or damaging the cable in any way.


Electric floor heating systems are virtually maintenance free, as long as they have been properly installed at the front end and there is no damage to the cables. If the cable damage is minor, it can often be easily fixed. Once they have been installed, good quality cables have a lifespan upwards of thirty years.


Electric floor heating is a cost-effective solution when used properly. The upfront cost of an electric system can be much less than that of a hydronic floor heating system. Despite this, hydronic systems have lower running costs.


A high-quality thermostat is another factor that helps to boost efficiency. It allows you to heat specific rooms independently and you can even program it to according to the needs of your lifestyle.

You can select from manual or programmable thermostats or incorporate a mix of the two if you prefer. A good quality thermostat will allow for greater control over temperature, zoning and timing, making it easy for you to make the most out of your floor heating system.

Bathroom Heating

The Benefits of Bathroom Underfloor Heating

Do you hate getting out of the shower and feeling chilled again as soon as you step onto the cold tiles? With good quality underfloor heating, you won’t have to experience this comfort any longer!

Floor heating systems are ideal for bathrooms (in addition to kitchens and open entertainment areas etc.) and work well under almost any hard floor surface. Underfloor heat radiates up through the floor and provides comfort underfoot while gently managing the room temperature.

Bathrooms and ensuites are particularly popular locations within a home for floor heating because:

  • Total comfort heating
  • Minimal energy consumption
  • Maintenance free
  • Cost effective
  • No ducts, radiators or vents
  • Hidden from view and does not take up valuable space
  • Can be applied under almost all hard surfaces
  • Silent and safe

Electric Floor Heating Installation

Cables in SCREED BED

In screed heating consists of heating cables fixed on top of the floor structure with a light steel mesh or fixing strips. The cables are embedded in a sand and cement bed which becomes heated, warming the floor covering. In screed heating is considered a direct acting system, although it does offer some heat storage.

This system is the best option for rooms that have some flexibility in the height of the floor. It is typically embedded in 20-30 mm of screed, usually at the time of construction.

Because of this, these systems can raise the floor of an existing room by 30 mm in addition to the floor tile. The benefit of this system lies in its ability to hold the heat for a much longer period when compared to an adhesive system.

These systems tend to take up to 30-45 minutes to heat up and give off heat for the same period once they have been turned off. Screed bed systems work well in areas that are irregularly shaped, although it is recommended that they are installed by a trained professional.


In slab heating consists of heating cable that is typically fixed to the top layer of the slab reinforcement, prior to the slab being poured. The heating cables heat up the slab, in turn warming the floor covering above. Cables are laid on the top mesh in about 30-40 mm of concrete and run during off-peak hours to cut energy costs and maximise the efficiency of the system.

As a storage system, in peak hours it runs on energy that has been accumulated during off-peak hours. This system is usually used in new construction before the slab is laid.


Under tile heating consists of a thin heating cable that is pre-laid on a self-adhesive fibreglass mesh. It sits in the glue or levelling screed which then becomes heated and warms the floor covering.

Cables can be placed in a tile adhesive of at least 5–15 mm depending on the design requirements of the room and the personal preference of the home owner. This is an ideal option for retrofitting and new construction projects.

This “on-demand” system is quick to respond to changes in the thermostatic reading. Located immediately under the heated surface, it tends to be the fastest floor heating system on the market.

The installation costs for these systems can be on the high side, but running costs have the potential to be quite low.

Under Floating Timber

We have 2 recommended under floating timber installations.

The first consists of using a using a lower wattage heating cable that is pre laid on a self-adhesive fibre glass mesh that is placed within a 10-12mm self-levelling bed and then the timber floated directly on top.

This system is best for renovations where you may have limited floor height but can also be used in new builds.

The second is using a lower wattage inscreed heating cable that is fixed to the floor structure with either light steel mesh or fixing strips. The cables are then embedded in a 20-30mm sand cement bed which you then float the timber on top of.

Under Battened Timber

Under battened timber heating can be used in situations where the heating cables cannot be laid in concrete, a screed or levelling bed. The cables heat up the air cavity under the timber which in turn heats up the timber floor surface above to provide heat into the room.

Bulk thermal insulation is required under the heating cables to minimise downward heat losses. A 30mm air gap is mandatory to ensure that the heating cables are well clear of nailing or other potential penetrations into the floor at any time in the future.

This is not the preferred method for installing electric under floor heating because the floor surface is very slow to heat up and it reacts very slowly to requirement changes.

The efficiency of the heating can also be reduced unless great care is taken to prevent any air movement out of the heating cable void area, and the amount of heat available to the room is limited by the timber flooring. Despite the limitations, this method can be good when there are no other installation methods are available.

For under battened timber floor heating that is placed on top of an existing floor, insulation is placed between the battens so that heat is not lost downwards. The cables are then laid on the insulation, which is attached to a light steel mesh.

This maintains the cable spacing with an air gap of at least 30mm between the heating cables and the timber floor above them (refer to the adjacent photo).

The timber flooring can then be nailed down to the battens, although care needs to be taken to ensure that nails do not penetrate the heated area. Cables should only pass through battens at their ends and nailing must stay away from this area.

Alternatively, if there is an existing timber floor and access is available from below, the heating cables can be attached to a light steel mesh which is fastened between the floor joists.

The heating cables are positioned no less than 30mm below the under-side of the floor boards with faced insulation installed directly below the cables.

A thermostat floor sensor must be installed under the timber floor. It is essential that the thermostat chosen can be set to limit the floor surface temperature to the maximum value that is appropriate for the type of timber floor being installed, in accordance with the timber floor manufacturer’s specifications.

Please note that when battens are required, then it is preferred the heating cables laid in a screed bed that can fill between the battens finished off to the top of the battens. This will increase efficiency and reduce the heat up time significantly.

Product Info Solutions Articles GET IN TOUCH

Our Own Range of Devex Systems branded Electric Floor Heating

Devex Systems is proud to announce the launch of its own brand of “Devex Systems” high quality cables, mats, thermostats and gas boilers as of 1 October 2018. As an Australian company with 40 years’ experience, we are thrilled to take this step to continue to meet your needs in an increasingly effective and efficient manner.

Through our own branded products, we are able to better control our product lines for you. In addition, we now have access to various European suppliers that will enable us to deliver innovative new technologies that are appropriate for our Australian market.

Devex Systems cables and mats have hand-made terminations ensuring higher quality and less susceptibility to termination faults. Having our own brand of cables and mats means that we can better deliver on large projects with short notice periods. The thermostats are user-friendly and specifically designed for Australian households and commercial buildings.

In terms of quality, these products are better than or equivalent to the ones we are currently providing, thereby maintaining our commitment to offer high quality products. We have sourced the best available European made cables, to ensure that we can locally manufacture the quality you have come to expect from us. The in house fabrication of cables and mats enhances our ability to pursue our mission of customer service excellence.

We invite you to review a brief overview of our new product range. More information will be made available on our website as of 1 October 2018.

Learn more in our announcement article.

Thin Heating Mats (c/w Single Cold Tail)

Devex Systems’ X mat™ MG-150 electric floor heating mat is only 3.5mm thick and uses a twin conducting heating cable for ease of installation, with very low EMF. It can be easily installed directly over concrete, fibre cement sheet or F-board insulation and into thin adhe- sive beds or floor levelling compounds. This means there is minimal increase in the floor height. The system is best utilised on a “time of use” tariff as it is quick to come to the desired temperature. The X mat is 500mm wide and come with a single 3m cold tail. The cables comply with IEC60800:2009.

We recommend the use of F-Board Insulation with electric floor heat- ing to improve warm up times and reduce running costs.

  • 20 year warranty
  • Output power based on 230 volts
  • Operating Temperature Range: -30°C to +80°C
  • Minimum Temperature during Installation: -5°C
  • Self adhesive mesh sticks to any clean substrate

Product Info

In Screed Heating Cable (c/w Single Cold Tail)

Devex Systems’ X cable™ CK-17 electric floor heating cable uses a twin conducting heating cable for ease of installation. This flexible cable made with fluoro-polymer and durable PVC outer sheath can be easily installed directly on a structural slab, fibre cement sheet, or F-Board insulation and into 20-25mm screed bed. This system best operates on a “time of use” tariff as it is quick to come to the desired temperature. The X cable is rated at 17 watts per meter and comes with a 3m single cold tail. The cables comply with IEC60800:2009.

We recommend the use of F-Board Insulation with electric floor heating to improve warm up times and reduce running costs.

  • 20 year warranty
  • Output power based on 230 volts
  • Maximum Operating Temperature: +70°C

Product Info

In Slab Electric Heating Cable (c/w Single Cold Tail)

Devex Systems’ X cable™ CT-30 electric floor heating cable can be installed into concrete slab under a wide range of floor coverings. The CT-30 has a very low EMF and its single cold tail makes it easy to install. The CT-30 is most suited to be connected to an “Off-Peak” or “Time of Use” tariff as an in-slab storage heating system. This cable’s steel armor and multiple layers of conductor insulation make it extremely durable and also able to be used for snow melting. The cable is rated to 30 watts per meter and it comes with a single 3m cold tail.

We recommend the use of Extruded Polystyrene (XPS) Insulation with electric in-slab heating to improve warm up times and reduce running costs.

  • 20 year warranty
  • Output power based on 230 volts
  • Maximum Operating Temperature: +70°C

Product Info

X thermostat™ TS Range

Devex Systems’ NEW X thermostat range of thermostats are specifically designed to work with the Xcable and Xmat range of products. They ensure simple and precise control of floor heating systems and other radiant heating systems like ceiling heating. There are over 6 different models to select from, all with sleek, modern designs and the latest technology including Wifi options.

TS 100

  • Electronic surface-mounted thermostat with setback mode.
  • Switch to select comfort, setback or external timer.
  • External timer to signal comfort or setback.
  • The ability to regulate either the floor temperature, room temperature, or a combination of both.
  • ON /OFF switch.
  • Relay 16A.

Product Info

TS 200

  • Electronic semi-recessed thermostat specially designed to control electric floor heating.
  • Setback for night reduction (-4°C) via external timer.
  • Possibility to regulate either the floor temperature, room temperature or a combination of both
  • ON /OFF switch.
  • Relay 16A.
  • Can be mounted horizontally or vertically.

Product Info

TS 300

  • Programmable semi-recessed thermostat for controlling heating systems.
  • Customisable 7 day timer programmable down to the minute.
  • Floor or room sensing
  • ON /OFF Main switch.
  • Relay 16A.
  • Can be mounted vertically or horizontally.

Product Info


Intelligent Electric Floor Heating that gives cost-effective, natural and lasting warmth.

DEVI is a European-made brand of intelligent electric floor heating systems, that offers a full range of high performing, long-lasting cables, mats and thermostats. DEVI sets the bar high as one of the most respected names in electric floor heating and a global leader in heating solutions.

Underfloor heating means any room can be designed with elegant simplicity. These electric radiant floor heating systems are recognised around the world as safe, silent and very comfortable, providing practical luxury in any room.

DEVI is the only underfloor heating manufacturer that develops, manufactures and markets complete systems containing heating cables and thermostats.

Consequently, there is complete harmony between the components of our heating systems, which means high performance, greater comfort, optimum reliability and usability, alongside low energy consumption.

DEVI’s intelligent electric floor heating systems are ideal for domestic, commercial and industrial projects. Having underfloor heating means any room can be designed with elegant simplicity.

These radiant heating systems are recognised around the world as safe, silent and very comfortable, providing practical luxury in any room. DEVI also supplies a number of accessory items including mirror and time and temperature control thermostats and specialised industrial heating products.

To learn more please visit our catalogue.

Electric Floor Heating Insulation