What are you smoking? - August 2022

Absolutely that is the case for the HEPA filters. The best recommendation I can offer for real deal smell particle air filtration is that you do what weed growers do. It's much cheaper than the $700-999 HEPA filters and better. You buy a $100~ inline charcoal can filter. They look like long metal perforated mesh tubes that are completely packed full of activated charcoal. Then you buy an approximately $100-150 inline very high CFM can fan for horticulture as well. Get one that can move at least 600 CFM (Cubic feet per minute) and simply setup that sucker nearby where you're smoking and make sure you have your intake and exhaust room pressure how you like it. You'll feel it create a bit of a vacuum in the entire room when you have the CFM right and every bit of smoke will then pass through the activated charcoal. There will be zero smoke smell.

Somewhat depends on price level of inline fan bought. They make models that are very quiet compared to a $1k in home HEPA we used to run. Plus depending on how you strap it up to your wall or door frame or wherever, you could have the fan mounted in another room and a length of 6" or 8" duct exhausting from your smoking room.

Hm, mounting fans and ducting to walls or doors would be just a wee bit of a giveaway when property maintenance people are in my apartment.  I thought you were describing a simple filter can with a fan on top of it that would just stand on a table or desk or whatever, pulling air through the filter and out the top.  Also, my room is not closed off from the rest of the apartment.  There's a doorway, not a door.  So we're not talking about a relatively sealed space, like a grow tent.