From floor plan to EPB‑ventilation plan. In minutes.

Belgium has its own regulations per region, and Aira calculates with the rules of the region where the home is: Flanders (the EPB regulations of the Flemish government) and Wallonia (the PEB regulations of the Walloon Region). For the minimum required design flow rate they refer to the standard NBN D 50-001. The numbers for Flanders are on the page about the EPB regulations.

A scan or photo (JPG or PNG) with the room names on the drawing, one image per storey. If the areas are printed on it, they are taken over.

They are measured from the dimension lines, but how accurate that is depends on the drawing style. Always check them and adjust them in the table.

Then nothing is guessed: the room does not count until you choose the type yourself. The same goes for a room without an area.

The balance between supply and extract, transfer openings and the design of valves, ducts and noise. You calculate that yourself.

Aira uses the minimum required design flow rate for homes: 3.6 m³/h per m² of floor area, with a lower and an upper limit per room type. A toilet and an open kitchen have a fixed flow rate. Source for Flanders: the EPB-pedia of the Flemish government, section ventilation. Wallonia has its own PEB regulations. vlaanderen.be. Last checked on 7 October 2026. We have not yet checked whether the numbers differ per building permit year: always check the rule that applies to your application. Read more about the EPB regulations.