Thank you Quo155, please let me give you a little more info so you can possibly answer the question as proficiently as you can. Thank you BTW.

The home the room is being built is in North NJ so it gets cold in the winter. Its my recreation room. The space I'm using is approximately 270 sq feet.

Doing the calculation for CFM I was given a number of 300 cfm however I know I'll need more than that especially if I have up to 5 smokers.
I was thinking 1500-1700 cfm exhaust pulling from two ceiling vents straight out of the house. I'm separating the hvac of my house and this room (not using dampers). So I have a few questions:

1. Is 1500-1700 cfm overkill? I'm using a speed regulator to adjust output depending the amount of smokers.

2. If I'm using that amount of cfm on exhaust, for fresh air, what should I do?

● Use no force air return, and allow the air to be pulled in naturally from the exhaust fan pulling OUT the air? (From negative pressure)

● Buy a fan (what cfm?) for air intake to PULL fresh air in from outside?

● Should I buy a duct heater? - The room will have 2 baseboard heaters as well as the fake fireplace heater.

● I've seen photos of the exhaust and fresh air intake side by side on the outside of the house in others cigar room. Doesn't that defeat the purpose of a fresh air intake? Wouldn't the intake pull the cigar smoke from the exhaust right back in?

I was going to have my exhaust and fresh air intake on opposite sides of the house.

EXCFM
2015-03-19 16.44.56 copy.jpg

If you suggest both a fan to pull in fresh air AND a duct heater, will the heater warm the air as fast as the fan is pulling it in? Other words...how do you pair the two? (A intake fan and duct heater)

Lastly...Air conditioning.

I'm thinking of going portable AC and connecting it to the return duct for fresh air to the AC unit. I'm not sure about the best way to do AC on a small budget so if you guys have any suggestions let me know. There is no windows in or near the room.

Thanks!

Didn't mean to ask so many questions at once, but it's all HVAC related and I need to start my purchases ASAP. We're starting demolition on a couple of walls and ceiling this sunday.