I am not a smoker, thank goodness I never went down that road, however I guess a lot of people who are, then one of our best friends, a guy I have known since all of us were in grade college together, is a cigar buff. Personally I suppose cigars odor great, until you light 1 up, then it odors love burning critter hair, then recently our pal wanted to take his love of cigars to the next level, and started working on a walk-in humidor for his house! Basically a humidor is supposed to maintain the perfect level of humidity for maintaining the best tobacco. A walk in humidor would need a little Heating, Ventilation as well as A/C toil as well, to make sure the ventilation method was working well, and to keep the room pressurized. Since the door would open once in a while, he wanted to use the central Heating, Ventilation as well as A/C method to create higher pressure inside the humidor. That way when the door opened the air would flow out, however not in, and all the air in the room would maintain the perfect humidity levels. Every one of us suddenly found out that this was not something his central Heating, Ventilation as well as A/C method could handle on its own, so all of us needed to do some building and renovating. I suggested putting a dehumidifier in the room instead, as it would be much easier. He informed me that having too little humidity is as terrible as having too much, so a dehumidifier would not work. It took some consulting with experts, however finally all of us got the humidity and ventilation issues all settled.