The Passivhaus Planning Package (PHPP) is the most sophisticated means of calculating the operational energy use for a building in its actual location and establishing if it is reaching the desired performance standard, whether that be:

Passivhaus Classic, Plus or Premium

Passivhaus Low Energy

Enerphit for retrofit projects

AECB Standard

We always recommend its early use in the design process to test options for form, orientation, openings and shading as well as to see the implications for fabric U values and the performance requirements for services and renewables.