Air Changes Per Hour (ACH or ACPH) of an air purifier determines how many times the device can exchange the whole volumetric air from a specific sized room in an hour. To calculate the Air Changes Per Hour you need to know the airflow rate (CADR) in cubic feet per minute (cfm) of the air purifier and the room dimension you want to use the air purifier. Find Air Changes Per Hour from the calculator below:
Air Changes Per Hour (ACH) Calculator:
The Formula is, Air Changes Per Hour = (Airflow rate in cfm x 60) / (L x W x H)
Other Calculators Related to Air Purifiers:
Airflow rate or CADR calculator
Energy usage calculator for air purifiers
Our Top Reviews:
The Best 9 Air Purifiers for Smoke (Wildfire, Cigarette)
Best Quiet Air Purifiers for Sleep
Learn More:
A Brief History of Air Purifiers
Frequently Asked Questions about Air Purifiers
Leave a Reply