Air changes per hour, or air change rate, abbreviated ACH or ac/hr, is a measure of the air volume added to or removed from a space (normally a room or house) divided by the volume of the space. If the air in the space is either uniform or perfectly mixed, air changes per hour is a measure of how many times the air within a defined space is replac...
Found on
http://en.wikipedia.org/wiki/Air_changes_per_hour
Air Changes per Hour is a term used to describe the amount of times per hour that an air purifier can clean and re-circulate all of the air in a room.
Found on
https://www.rabbitair.com/pages/air-purifier-glossary
No exact match found.
