Hi. It works quite well. Has the greatest weight of charcoal of any purifier for the money.
I run it at high speed while smoking and keep it running for a few hours after I'm done. You will smell tobacco while you are smoking but it does a good job of sucking in the air. Here is the spec from the manufacturer. My garage is 22x24x10 = 5,300 cu ft
360° air distribution allows for purification for up to 2000 sq. ft with 2 air exchanges an hour (based on 8-foot ceilings) = 16,000 cu ft.