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Carbon Film Installation Guide

Note: For guide purposes only; use manufacturers instructions (supplied) when installing.

click here if you wish to download manufacturers instructions

From 1st January 2005 Installations must comply with Part P Electrical Safety regulations click here for details.

Ecofilm mats are rated at 130 watts per square metre (W/m) output. The heating film is less than 1mm thick.

Measuring up

It is extremely important to measure area correctly;
re check your measurements before attempting to fit the film.
If the film has been damaged in any way and it does not fit we will not accept it as a return.

Measure the room; avoiding all permanent fixtures e.g. fixed units etc., this is important to avoid causing possible damage to the floor due to 'thermal blocking'; this is when the heat cannot radiate from that part of the floor because it is being blocked by a solid object e.g. a fixed unit which results in localised heat build up.

To minimise the number of connecting cables choose mats to fill the longest legnth. 

If in any doubt contact Discount Floor Heating for advice.


This example shows a room with units that are to be permanently fixed in place (e.g. a living room).

The floor size is: 6m x 4.5m; a total area of 27m. Allow at least 50mm around perimeter.

This area can be filled with 4 mats of 1m x 6m (ES13-1060) and 1 mat of 300mm x 2.5m (ES13-325).

Trim the mats to required lenght (see cutting instructions).

Each  Ecofilm  mat has one live and one neutral connection; where a number of mats are required then it is better to use a suitably sized junction box to house the connection block.

In this example 5 mats are required to make up the area to be covered; this means ther are 5 negative (neutral) connections and 5 positive (live) connections to be brought together into one positive (live) connector block and one negative (neutral) connector block; connecting the 5 mats in parallel as shown.

The thermostat sensor is best positioned where the floor will not be later covered with e.g. furniture .



It is advised to use insulation to avoid heat loss to the sub floor; resulting in poor floor heating performance.
Lay the insulation on the floor and tape the joints, lay the boards so that where possible the joints are staggered.

Vapour Barrier

Vapour barrier must be used over the finished Ecofilm mats prior to covering them with wood/laminate in order to provide optimum moisture and additional mechanical protection.
Lay the vapour barrier on the Ecoflim mats; overlapping any adjacent pieces by a minimum of 100mm and tape the joints.


The location of the thermostat is your choice but it makes sense to locate it as near to the electricity supply as possible and is normally in the room being heated.

Connect via a fused spur or use a dedicated supply with its own RCD (consult your electrician). The thermostat sensor must be positioned in an area that will not be later covered by e.g. a mat or item of furniture; so measure where this will be and cut a channel approximately 10mm x 10mm deep and 300mm long in the insulation to locate the flexible floor probe conduit in.

The thermostat is rated at 16amps and will control a maximum heated area of 3680 watts.

Laying Mat

The black connecting wire can be cut as required once you have established that you have enough to reach your supply, however never cut the film diagonally or through the carbon element (black stripes) under any circumstances.

You must leave a minimum of a 50mm gap from the walls and any other fixed object.

You must never overlap mats.

Before you cut any mat make sure that you have ordered the correct size as it can only be exchanged if the mat is still intact.

After laying the mat you can use an ohm meter to test the circuit; the resistance should be as shown on the sizing guide in the maunufacturers instructions.

Avoid excessive traffic over the mat prior to applying the floor covering.

The final connection should be carried out by a qualified electrician.

Floor covering

The use of suitable protection boards will prevent any possible damage during floor covering.


It is highly recommended that you connect your system via a fused spur (to isolate the system for future maintenance) and/or a safety contact breaker (RCD); an electrician will be able to advise you and MUST make the final connection.

The electrician should affix a suitable advisory warning notice on the electricity distribution box and complete the attached certificate which must be retained to serve as part of the guarantee requirement.

Switching on

If adhesives have been used; allow at least 3 days for the adhesives to dry naturally before powering up your underfloor heating.  Check with your floor manufaturer.

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