When addressing the energy efficiency of a building, one of the most important players in the game is the compactness of its thermal envelope. Is there a way to measure the compactness of a building? Yes: it’s the compactness ratio.
We finally had the chance to test DesignPH, the SketchUp plug-in that allows you to carry out the preliminary design of passive buildings in 3D. Once the model is created, you can export the data to PHPP (the energy balance software for passive house design), to further the energy design in depth. Even though this plug-in has been available on the market for a couple of years, since version 8.5 of PHPP, our recent meetings with passive house professionals tell us that this tool is not yet very widespread. It is the case of Italy, as well as the impression we got from our recent trip to the USA.