Aira
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An adviser in a kitchen with a ventilation valve in the ceiling uses Aira on an iPad

From floor plan to BR18‑ventilation plan. In minutes.

No drawing, no hassle.

Start for free

First 3 homes free

How it works

Step 1

Upload the floor plan

Upload a scan or photo of the floor plan (JPG or PNG). No preparation needed. Room names and printed areas are read.

Step 1: upload floor plans, one image per storey

Step 2

Check what was recognised

Rooms, functions, doors and windows are already recognised. You stay in control: correct whatever is wrong.

Step 2: the recognised rooms with function and area, ready to check

Step 3

Download the result

The rules are applied and the supply and extract points are placed on the floor plan. Adjust what you need and download the plan as a PDF or PNG.

Step 3: the ventilation plan on the floor plan, with points you can drag

Try it on your next project

Start for free and calculate a home. Tell us what’s missing.

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All countries

Choose the plan that fits your work

Start with 3 homes free. Pick a plan when you are ready.

Starter

For independent advisers and installers.

kr 149/month

Start for free
  • 15 homes per month
  • 1 user
  • Extra homes at kr 14.99 each

Includes:

  • Ventilation table per room
  • PDF download

Small business

Popular

For companies with a few people working on homes.

kr 379/month

Start for free
  • 50 homes per month
  • Up to 5 users
  • Extra homes at kr 10.99 each

Everything in Starter, plus:

  • Your company name and logo on the report

Large business

For companies that work on many homes every month.

kr 749/month

Start for free
  • 150 homes per month
  • Unlimited users
  • Extra homes at kr 7.49 each

Everything in Small business, plus:

  • Priority support
  • More than 150 homes: contact us

Frequently asked questions

Everything you want to know

The Danish Building Regulations BR18, chapter 22, § 443. The numbers are taken from the official text; always check the version that applies to your project. Read the full rules

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 its function yourself in the check step.

The calculation gives the flow rate required per room under the regulation. Duct sizing, the design of valves and noise are not covered; you calculate those yourself.