How to measure the correct Suction Power required?

To calculate the appropriate airflow level for your kitchen, you should multiply the volume of your kitchen by 10.
For example:
If your kitchen is 3 metres wide, 5 metres long and 2.7 metres high, your calculation will be:
(3 x 5 x 2.7) x 10 = 405
This means that a hood with an extraction rate of 400 m3/h should achieve efficient ventilation of the room.