Your growroom is 192 Cubic Square Feet. You should be using an exhaust blower with a CFM rating of over 192. Heres a few images of some good exhaust blowers for sale. http://www.gchydro.com/detail.asp?product_id=XACTIVAIR If I were you I would at least be using a 265CFM model. It's reccomended that you reintroduce new air into the growroom at least once every five minutes. For optimal results you can reintroduce new air every one minute. With the 265CFM model you will be exganging old air for new air 1 and 3/4 times every minute. That will help reduce your heat problems if you install it correctly near the top of the room or door. That room you have there could be a really nice set up if you were serious about it. If you want me to design you a professional growrrom and you have cash to buy the equipment I will draw up plans for you. You could get quite a few plants in there and if you sold some of what you grew you would have your money back in no time flat. Anyways lemme know. Water when the container feels almost dry. ALMOST.