designPH 1.5 PRO updated for the Southern Hemisphere

Good news for all designPH users in New Zealand, designPH 1.5 has been released as a free update and it now automatically takes account of the orientation of Southern Hemisphere designs! (No need to flip the model.) For full information on the update visit Existing customers can update for free at after login. Read more about designPH 1.5 PRO updated for the Southern Hemisphere[…]

All models are wrong – but some are useful

The right tools are needed to do a proper energy modelling job. For Certified Passive Houses, using the Passive House Planning Package (PHPP) is mandatory. It is the only energy modelling tool in the world that has successfully been tested against real-world results on a large number of projects (see here for some examples). Thousands of Certified Passive Houses deliver results very close to the modelling expectations. Other modelling tools are clearly not performing that well, or have never been tested. […]