Air Changes per Hour Calculator
ACH stands for air changes per hour and provides information on the hourly ratio of air exchanged within a room. Generally, ACH should vary between 4–30 depending on the type of room and its purpose. Higher ACH should be granted for:
- closed spaces — garages, manufacturing halls
- spaces with increased humidity — kitchens, bathrooms
- gathering places — malls, conference rooms, classrooms
- rooms storing temperature- and humidity-sensitive materials and products — storage houses, pharmacies
- places of increased infection risks — hospitals, laboratories
Thus, the question of how to calculate air changes per hour is a practical matter in various settings.
