Stephan Rupp

Building Research Institute of New Zealand (BRANZ)
Co-heating tests on a residential dwelling with variable airtightness levels

This presentation focuses on the experimental characterisation of the thermal envelope of a residential dwelling with variable airtightness levels. Co-heating tests have been conducted on a test building where air tightness can be adjusted from 1ach@50Pa to 13ach@50Pa.

Maintaining a consistent internal temperature of 30°C, testing ran for two to four weeks over a range of external temperature ranges, due to the natural variability of the climate. The infiltration rate of the building was measured using a tracer gas technique. Considering the temperature difference, solar gain to the building, heating power and the real infiltration rates of the building, conclusions can be drawn on the effective thermal properties of the building envelope. 

About Rupp:
Rupp has studied physics at the Universität Tübingen (Germany) and Victoria University of Wellington (New Zealand). He holds a Bachelor of Science (Honours) and Master of Science in physics. 

Rupp has been employed with the Building Research Institute of New Zealand (BRANZ) as a building physicist for more than five years. Working in the building performance team, his focus is in the areas of moisture transport – especially in and out of roof cavities. His prior professional activity was in applied research of high-temperature superconductors and the research and development of crystalline solar cells on an industrial scale.