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Single-family home in Erlenbach

With this single-family house, the combination of solid construction with ThermoShield Exterieur and infrared heating with ThermoShield Interieur ensures a lower energy consumption than the neighboring house with "better" U value.


The sensor for the room air temperature therefore does not indicate the actual measured variable, but a higher value. This is because it is radiated and thus heated.

When it comes to radiation processes, the U-value theory is wrong. It merely contributes to confusion and dilution, rather than providing a model explanation. The reason for this is that radiation processes are alien to U-value theory.

The room air temperature is not the determining quantity when it comes to IR operations. This is about radiation physics in the wavelength range around 10 μm, in the following cases:

  • • surfaces coated with thermoceramic membrane technology (IR reflection)
  • • Heating with heating systems based on the principle of heat radiation (IR heating)
  • • the combination of IR heating and IR reflective coating

By combining the IR heater with the ThermoShield coating, the residents of the single-family home in Erlenbach achieved a high degree of energy efficiency as a result of comfort (higher surface temperatures, more temperature symmetry), faster heating, delayed cooling - all with a "poorer" value than the neighboring house.Since 2015 it is read at "For the period from March 2008 to March 2014, heating costs are proven below € 450 p.a.. Compared to a passive house according to EnEV2009 30% less heating costs, 20% less construction costs, 50% less maintenance costs. "This contradicts the U-value theory, but this is the practice.

It is a single-family house. The wall construction consists of 24 cm aerated concrete, internally and externally a total of 3.0 cm plaster as well as inside and outside coated with Thermo-Shield (viz. outside with ThermoShield Exterieur and inside with ThermoShield Interieur).

Heated with IR (infrared) radiation panels, which consume primary energetic demonised electric current and create a better thermal comfort than any convection heating can.

The infrared heating system installed in combination with the IR reflective coating ThermoShield provides a maximum of comfort and economy. For the period from March 2008 to March 2010 heating costs are demonstrated below € 450 p.a.

At the same time, the evaluation of the measurement results leads to the U-value theory ad absurdum. It is analytically and metrologically proven that the so-called U-value as a primary measure for the heating energy requirement is a fantasy product.

The basis for the evaluation is a log from 2011 on measurements of the U-value of exterior walls of several single-family homes with different wall construction. The measurements carried out confirm the positive influence of Thermo-Shield Interior and ThermoShield Exterieur on the heat resistance of external walls.

The task of the measurements was to cover the positive influence of ThermoShield on external walls with different wall constructions. Furthermore, the cooling behavior as well as the warm-up phase of the air and the wall temperature should be determined.

The measuring sites were 2 single-family homes with different wall constructions. We measured on the west side of the house at an altitude of about 3-5m. All measurements were largely the same with a temperature difference between inside and outside of approx. 15 ° C. The measuring instrument TESTO 635 and the sensors PT100 were used. The wall construction of the neighboring house consists of 36.5 cm of aerated concrete, the U value here is an average of 0.30 W / m²K, as the manufacturer also publishes in his flyer.

Measured from 20.02.2010 17:30 to 21.02.2010 9:00 o'clock with different measuring variables in the room and outside:

  • • Room air temperature inside
  • • Air temperature outside
  • • Wall surface temperature inside
  • • "the U value"
  • • rF [%]; Probably the rel. air humidity outside
  • • Mat [%], the material moisture at an unknown location

In this case, the question is as follows: What is measured? Is it really the room air temperature? The wall surface temperatures rise because the IR heater radiates heat radiation. In addition to the primary radiation, the secondary radiation also has an effect. This is the reason that also concealed wall surfaces which are not in the direct cone of the heater, e.g. behind an armchair, get warmer.