Air Changes per Hour (ACH) for the Amaircare Car Air Purifier XR-100

 

Small Car (2-seats) (Approx. 75 cubic ft)	Medium Car (4 seats) (Approx. 150 cubic ft)	Small SUV (6 seats) (Approx. 240 cubic ft)	Large SUV/Van (8 seats) (Approx. 300 cubic ft)
16 ACH	8 ACH	5 ACH	4 ACH

Generally speaking, the more air changes per hour (ACH) you can provide, the more effective a filter can be.
These figures are based on volume calculations alone, any outside air introduced into the cabin (like open windows, or through the ventilation system) will lessen the ACH received.