The "natural" heating floor

The "natural" heating floor

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If you are looking for the ideal heating that is aesthetic, comfortable, durable, economical and ecological, the SOFATH® underfloor heating may appeal to you! Corentine Holdsworth, green heating professional at SOFATH®, sheds light on this "new generation" system. Interview by Lise Lebrun

What is the principle of the heated floor?

Remember that there are two types of heated floors: the direct expansion heated floor or the hydraulic heated floor. In the first case, a refrigerant circulates in the tubes and in the second, it is glycol water. The principle is simple: the heated floor returns the heat extracted from the exterior and part of the energy consumed by the heat pump to the house. The SOFATH® hydraulic underfloor heating is made up of different rings of Reticulated Polyethylene (PER) from 60 to 100 m in length. The glycol water circulates inside the tubes and thus provides optimal thermal comfort since it ensures a homogeneous distribution of heat in the house.

What are the advantages of the heat pump to operate this system?

This system is both ecological and economical. Ecological because the heat pump is an efficient solution for producing heat from free energy drawn from the environment. Air (aerothermal), water or even the ground (geothermal) thus store a large amount of heat, inexhaustible and clean, constantly renewed by the sun and rainwater. The heat pump is a device capable of capturing this thermal energy (heat) from the external environment (free energy) to restore it inside a building in order to heat it. It is also economical because for 1 kW of electricity consumed by the compressor, the useful heat released in the house is, depending on the configuration, from 3.3 to more than 4 kW.

Why choose a floor heating rather than a conventional heating?

The underfloor heating is not at all compulsory, but some people find it more aesthetic and more comfortable than radiators or fan coil units. Using the floor as a heating element has many advantages. The entire floor behaves like a radiator mainly diffusing heat by radiation. In addition, thanks to its very large useful surface compared to conventional radiators, the floor heating diffuses the heat at very low temperature. This principle brings a soft and homogeneous temperature in all rooms, does not dry the air, does not cause dirt along the walls and facilitates the arrangement of furniture.

What are the constraints imposed by such a system?

An annual leak test is requested from the owners of all heat pumps (in accordance with decree n ° 2007-737 published on May 07, 2007).

Can it be installed as part of a renovation?

Yes, in the case of a major renovation (where only the walls and the roof remain). Indeed, the installation of a heated floor requires pouring a slab (the tubes are incorporated in the slab of the house). In the case of a simple renovation of its heating system, a heat pump can be installed to replace or replace an existing boiler while retaining the existing network of radiators.

Can we heat the house zone by zone?

Yes, thanks to a simple and easy-to-use system, the temperature can adapt to each area of ​​the house, according to the needs and wishes of each. Thus, the heating is regulated to the nearest degree, zone by zone, night and day, thanks to a room thermostat. Each zone, made up of one or more rooms, such as the living room or the bedrooms, is independently controlled to provide the ideal temperature.

How to maintain your heated floor?

No periodic maintenance is recommended. It is advisable to have the cleanliness of the circuit checked approximately every 7 years, in order to check whether a rinsing of the circuits is necessary. The purpose of this operation is to eliminate any deposits that form over time.

Can we cool the house instead of heating it?

Yes, it is enough to reverse the direction of the passage of the refrigerant in order to reject outside the calories taken from the house. To ensure the effectiveness of cooling, it is recommended that the glazed areas be covered as much as possible with the shutters and that the doors and windows not be left open. Information on


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