Summer comfort and RE2020: reversible surfaces associated with an anhydrite screed are the asset for tomorrow

To best respond to this and encourage the use of products with reasonable energy consumption, REHAU offers a range of high-performance heating and cooling systems that can all be combined with an anhydrite screed, making it possible to gain even more efficiency.

What is the RE2020 regulation?

The RE 2020 pursues three major objectives supported by the government: an energy sobriety objective with a decarbonization of energy, a second concerning the reduction of the carbon impact and finally, the guarantee of comfort in the event of high temperatures.

For this last point, buildings must comply with energy and environmental performance requirements, and in particular the limitation of situations of discomfort in the summer period. The DH indicator expresses the degree-hours of discomfort. It is calculated according to several parameters and measures the duration and intensity of periods of discomfort for the occupants during a year. Its maximum threshold is set at 350 DH, i.e. about 7 days of discomfort with an overrun of the comfort temperature, evaluated at 26-28°C, by +2°C. Which is obviously little.

Today, 1/3 of the low temperature underfloor heating-cooling market is done with an anhydrite screed

The first solution that comes to mind for everyone to deal with this summer discomfort is air conditioning, but the heating-cooling surface is a much more effective alternative solution and one that is more rooted in the RE2020 objectives in terms of energy sobriety. Not least because REHAU reversible floor solutions can be combined with an anhydrite screed. Unlike conventional screeds made of concrete or cement, the anhydrite screed, based on calcium sulphate, allows a gain of 30% on kCO2 emissions with a complete system* (tubes, insulation and coating).

The advantages of an anhydrite screed are numerous, in particular concerning the weight and the fluidity of the material. But for several years, manufacturers have been offering increasingly attractive products: reduction in coating thickness compared to a conventional screed, improved conductivity to emit or absorb calories, etc. which perfectly meets the needs of the construction market in the context of RE2020.

By integrating a regulation into the installation, the gain can be even greater: for example with the hyper-reactive REHAU NEA SMART 2.0 connected regulation, equipped with a temporal variation of 0,3k, which will make it possible to gain another 10% on kCO2 emissions.

* source Cochebat