To perform the calculation, the size of the room and the CADR of the equipment must be taken into account.
In the case of our Espirare MAX, it has a CADR of 400m3/h, that is, it cleans 400 m3 of air in 1 hour. Assuming we have a room that is 20 m2 by 2.5m high, it would be 50m3. If we divide the CADR of 400 by the 50 cubic meters, the result is that the purifier would clean the air in this room 8 times in 1 hour.