An eFilm heated ceiling in the Jura

A climate that forgives no approximation

In the Jura the design outdoor temperature falls far lower than in half the country. Sizing is therefore not deduced from a ratio per square metre: it is calculated on real losses, otherwise the output falls short on the days it is needed.

The heating film at altitude

eFilm is a carbon film with tinned copper conductors, flame-retardant on both faces. Its behaviour does not depend on the outdoor temperature, and its output per square metre is chosen at study stage from the need calculated for the room.

Insulation, not negotiable here

The greater the gap between inside and outside, the faster the loss through the ceiling. Closing the plenum with a reflector therefore becomes the element that decides consumption, more than the choice of film itself.

Intermittent occupation

Many houses in the range are occupied only for periods. Radiation makes a room usable in a few tens of minutes, whereas a high inertia system requires anticipating arrival by several hours.

Frost protection driven remotely

A connected thermostat allows a low set point to be held and the heating restarted before arrival. It is the most used function in this kind of home, and it often justifies remote control on its own.

What to check first

The subscribed power. In a cold region a correctly sized heating ceiling may call for a higher supply than the one in place, and that point is dealt with with the electricity supplier before the equipment is ordered.

The thermostat is presented in the installation tutorial, and the film on the how to choose your heating film page.