Ontario,
I'm a relative noob here @ BoB, but I'm a long time cigar smoker.
About 10 years ago we built a 1200 sqft addition to our house. We doubled the size of the master, added a walk in closet and also built a nice size media room. In the attic space above I built my home office.
While we were in the framing stage I happened to catch a diy mancave type of show and they had installed a high velocity ventilation system in it to evacuate cigar smoke.
Perfect I thought! I'll make my home office my mancave as well.
I started my research and landed upon a Panasonic Whisper Quiet ventilation fan. I did some more google fu and found a place out in SoCal that had em on sale. I picked up a 440 or 450 CFM fan for a few hundred dollars.
Then I had the HVAC guys place three regular ac vents in the ceiling of my office, er, uhm, mancave.
The regular HVAC vents were in the floor and now directly above them are the exhaust vents.
The unit is mounted out in the attic and connects to all three ducts and then vents it outside.
I really like how it is almost completely silent when running. If the stereo or tv is on you can't even hear it.
I also like how inconspicuous it is. Unless I point it out to someone they never even realize that my office has an abundance of vents. 8)
And best of all... It works very well.