Dear readers,

in the last couple of weeks, the “case study #1” received some helpful comments. In consideration of those comments we updated the study. The important changes and additions are:

Key metrics for high performance buildings in international SI units as well as in American  PI units. These standardized metrics enable a quick comparison of various building classes, types and sizes across the globe. An important aspect of that is, that consumption data is based on actual measured values.

The content pertaining to the heating and domestic hot water systems was re-organized in chapter 4 and 5. The goal was to provide a better presentation of the different components of those systems as they were used in the townhouse of this case study.

Another important  addition is found in chapter 8.2, comparison with conventional space heating systems.  In accordance with the publications of Dr. Ludger Eltrop from the German “Institute for the Energy Industry and Efficient Energy Applications” a total cost comparison table for various common German heating systems was prepared. The table also includes the data for the townhouse of this case study.

Lastly, the calculation for the energy passport in Appendix 1 was translated into English, following the terminology of the European BS EN 12831:2003 standard.

With those changes made, we hope that the updated case study can set a standard for future reports on electric infrared heaters and their use in energy efficient buildings.

To download the updated study, please click here


The authors

Prof. Markus J. Loeffler                             Mr. Oswald Oberladstatter, ME
Gelsenkirchen, Germany                             Perl, Germany