In the section called "Areas" you will find four fields: "Gross area", "Net area", "Gross floor area" and "Atemp" (see image below). In the fields called "Gross", "Net" and "Gross floor area" you will see the areas for a building. In the field "Atemp", you can enter a heated floor area for a building. If a building has been created in Pythagoras Web, its usable, net and gross area will be zero (0).
