LARX Carbon Film Heating System LARX.CZ for designers

Comfortable underfloor heating

LARX carbon Films provide electric heating and operate on the basis of the proven resistance method of heat production. From the point of view of the physical principle, this method of heating is 99% efficient. Carbon heating Films provide Local heating – it produces heat directly and only in the room where it is needed (savings). The strips of carbon heating Films are connected in parallel by a brown and a blue wire.

The heating system is usually designed with a separate circuit and thermostat for each room. The switching element of the thermostat is a power relay, so the control is performed 0/1 (off or on). The thermostat must be designed for electric underfloor heating and must have a protective floor temperature sensor.

Carbon heating Films are very thin, with almost no impact on floor depth. Installation over the entire surface of the room guarantees heating across the whole floor. We do not recommend large gaps between the individual strips of Film; they cause uncomfortable temperature differences. Films should not be installed under built-in furniture and fixtures. We recommend installing them under other furniture; the furniture should then have legs of at least 5 cm.

1Application directly
under floating flooring

1Any flooring with click system
2PE film 0.2 mm
3LARX CARBON-FILM.COM
4Acoustic insulation

2Application
under screed

PE film 0.2 mm and screed separation film

1Any flooring / tiles
2Possible tile glue
3Anhydrite / concrete / floorboards
4PE film 0.2 mm and screed separation film
5LARX resistant carbon film

Technical parameters

LARX-RF150W050S

Technical data sheet
Width 50 cm
Output 150 W/m²
Thickness 0.7 mm
Electric resistance 705 Ω/m
Maximum operating temperature 45 °C
Maximum design temperature 80 °C
Designed for installation under anhydrite/concrete or floorboards
Unique double lamination for the highest resistance to mechanical damage and moisture
High performance, suitable for all types of constructions, from family houses to development projects and industrial buildings

Durable LARX carbon heating Film 150 W/m²

LARX-CF100W050S

Technical data sheet
Width 50 cm
Output 100 W/m²
Thickness 0.4 mm
Electric resistance 1,058 Ω/m
Maximum operating temperature 40 °C
Maximum design temperature 60 °C
Designed for installation directly under interlocked non-glued floor coverings
Very thin, yet durable for maximum lifespan
Fastest start-up, extremely fast control
Suitable primarily for residential spaces, for above-ground floors in new buildings and in passive houses

Design notes

In the construction of the floor, heat is spread by conduction into the room by radiation and convection; emissivity of the floor covering has an effect - applies to all types of underfloor heating (all Films, hot water, etc.)
The reflective Film placed in the floor structure under the carbon heating Film has a completely negligible effect, it is not necessary
The carbon heating Film always heats in both directions in the same way, therefore the stronger the thermal insulation under the carbon Film, the better (EPS, XPS, PIR, Hobra, mineral wool, etc.)
For every heating circuit, we always only install one type of Film
The output of carbon heating Films in a room should be at least 1.3 times greater than its heat loss
According to many years of experience, the real energy consumption is around 60% of the result of the standard day-degree method (the main reasons are fast and accurate control and heat production only where it is needed)
When installing floorboards or floor coverings directly on the carbon heating Film, it is necessary to embed the supply cables and connectors into the grooves in the thermal insulation, or place an additional base plate under the Film, preferably Hobra, in which such grooves are provided.
Concrete or anhydrite above the Film must contain additives for underfloor heating
The floor covering must be suitable for electric underfloor heating
In bathrooms and similar rooms, carbon heating Films must be connected via a circuit breaker and must be covered with a grounding net
If you are unsure or need more information, contact us and we will be happy to advise you.

Useful information on the blog:

DIY installation of heating Films - tips and tricks
Half-truths about carbon heating Films and IP protection

Design procedure

Choice of installation method - under screed, floorboards or directly under a floor covering
Calculation of heat loss for each room
Preparation of the laying plan, including positions of thermostats
Proposal of the output of carbon heating Films - division into circuits, possible strengthening of circuits in large rooms
Calculation of control resistances - after installation, we recommend measuring the resistance of each circuit and comparing it with the calculation, as well as checking the heating function using a thermal imager.
Design of switchboard mounting, dimensions of main circuit breaker and other elements

We can prepare a heating solution

We will be happy to provide you or your electrician with support for the correct installation of our heating system. If you do not know how to design a heating system, contact us.

as part of the price quotation, we will send you:

laying plan for carbon heating Films
all manuals and links to instructional videos
description of construction readiness
list of materials for purchase of a complete heating system

Certification

LARX carbon heating Films are carefully tested

It meets strict Czech and European standards and safety requirements for a healthy indoor environment. It has all necessary certifications for the Czech Republic and other European countries.

Declaration of Conformity

Declaration of the Korean manufacturer on the compliance of LARX carbon heating Film with all standards, including IP protection.
More in our blog post.

LARX CARBON-FILM.COM Certificate for the wire

LARX connecting wires

They meet the strictest Czech and European standards and requirements for safety. The above certification applies for the Czech Republic and other European countries. It is the highest quality cable of its kind due to the increased double insulation and tinned copper.

LARX CARBON-FILM.COM heating system for designers

Benefits for designers

Warranty 15 years

Implemented projects