Brussels — A passive house built in Brussels to demonstrate the energy efficiency of polyurethane construction materials has been tested for thermal performance.
The passive house, established in a partnership between trade association ISOPA and Belgian construction company Bostoen, is located in Evere and has now been rented to tenants - as previously reported at utech-polyurethane.com.
According to researchers at The KU Leuven - University of Leuven, “the building fabric meets very high standards, and is in line with the high design levels of a passive house.”
The PU passive house was designed as a quasi-zero energy building. As part of the university team’s assessment, the overall heat loss co-efficient of the house was evaluated.
KU Leuven performed a co-heating test on the empty building in which its indoor environment was heated to a constant elevated temperature (eg 25°C). By measuring the heat input necessary to keep the house at this temperature and plotting the energy use against the indoor-outdoor temperature differences, an estimate of the heat losses through the building fabric was made.
Analysis of the data yielded an estimated heat loss co-efficient of 60.0 W/K, with a standard deviation of 3.0 W/K.