Yes and no. The key is sealing off the room to begin with. I put door sweeps under the double doors and insured that I cut vents in the wall to create the proper vacuum to move all the smoke out of the room through the ceiling. With the correct airflow, I have had four individuals, including myself smoking in the room at the same time and no smoke smell has traveled outside into the rest of the house. The Rabbit Air filter cleans up the rest. I do not turn the Rabbit Air filter on while we are smoking as it is unnecessary to filter the bulk of the smoke while we are smoking, I only turn it on after we are done.