General information on ventilation.
The exchange of air (air Wech donkey rate per hour) for the ventilation of a room depends on its usage.
A smoking rooms (to 20 LWR / m³) must be ventilated differently than a normal living room (3-6 LWR / h)
private facilities needed 5-7 LWR / h,
Shower 15-25 LWR / h
Library 4-5 LWR / h
Office space 4-8 LWR / h
private kitchen 15-25 LWR / h
Example:
An office space needs an air exchange of 4-8 LWR / h and assumed the office has 20m² with ceiling height of 2,50m gives 50m³ volume and an average LWR / h of 6, ie
6 LWR / hx 50m³ = 300m³
Here the 150mm fan would be ok