I began brainstorming and building my first cigar room in 2006 shortly after moving into my first home. My brother and I had a simple idea of creating a completely sealed up room with its own ventilation system so you can smoke all day long and not affect the rest of the house.
An exhaust fan creates a pull in the room. The room is sealed so the only place the room can pull new air from is a fresh air intake run connected to the outside of the house. This creates a flow of old air being exhausted and new air being brought in continually.