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While designing the ventilation systems, it is always taken into consideration that the usage purpose of the spaces and the people in the spaces will pollute the air. While calculations are made, the approximate value experienced per person in the space is taken. The usage purposes of the venues may change over time or the number of people may increase. The same conditions should be observed when choosing an air cleaner. The amount of fresh and clean air needed per person is determined by the authorities.
What is ACH (Air Change per Hour)?
Air change per hour (ACH or ACPH) is a measurement of air volume that is added to a room divided by the total volume of the room. Put simply, it measures how many times the air in the room is replaced. Higher ACH values mean better ventilation. The formula is as follows:
ACPH = Q / Vol
This table shows us the reference values of air volume by room usage according to DIN 1946.
If you’re not sure how to determine your room value or choose the correct air purifier, you can contact us directly.
Minimum Outside Air
Recommended Number of
4 (private) 10 (public)
6 (private) 10 (public)
Swimming Pools (private)
When choosing an ozone generator (ozone machine), attention should be paid to the company's quality documents, references, ozone gas information, product information