What is the Clean Air Delivery Rate (CADR)?

The CADR indicates the volume of filtered air delivered by an air cleaner. The higher the tobacco smoke, pollen and dust numbers, the faster the unit filters the air. The AHAM Label (found on the packaging of the air cleaner) lists three CADR numbers ─ one for tobacco smoke, one for pollen and one for dust.

First, find the AHAM suggested room size noted prominently in the label. This suggested sizing should match the size of the room you are trying to clean. Next, compare CADR numbers from manufacturer to manufacturer and from air cleaner to air cleaner. Higher ratings for the dust, tobacco smoke and pollen CADR numbers indicate that the unit will filter the air faster than a unit with lower ratings. If the ratings are same from one unit to the other, then the air filtering performance is similar.