In general, the Passivhaus standards require an air tightness of 0.6 air change per hour (ACH) at a pressure of 50 Pa, a U-value of less than 0.15 W/m2 K for the walls, and a U-value of less than 0.8 W/m2 K for the windows, which are higher than typical UK building ...
3.1.1. Theoretical Calculation of the U Transmittances of the Enclosures In this study, we measured the house’s thermal transmittance U value, but we did not analyse the effect of the parameters affecting the dynamic regime of the heat flow through the enclosures, such as thermal admittance,...
The Passive House Institute provides consultancy on the thermal optimisation of building products from the very beginning of the process through to pontetial Passive House Component Certification. In addition to other tools, we make use of two and three dimensional as well as dynamic thermal flow an...