Quote Originally Posted by irydyum
We need some people who have used CPU fans for exhaust to chime in. I think you are on the right track principally, but I dont think a small cpu fan is going to cut it. I don't think their CFM ratings apply to a large environment?? Not sure, but something is screaming at me that it won't be enough.

How about instead of investing in cooling, invest in CO2. It will allow you to run much higher ambient temps, especially if you go the LED route. It also won't cost nearly as much to run. Just another thought. You could keep the room sealed throughout lights on, and you could run a single exhaust with a carbon scrubber on a thermostat or timer. I don't run CO2, but I'm sure someone can chime in that does:thumbsup:

How about installing a backdraft stopper at the point where your A/C is going to enter the room. It's like a one way valve almost where the pressure from the a/c should open and close the vent as it goes on/off. Just throwing ideas out.
hey thanks again...

i am not sure and you may be correct about the pc fans (i am not referring to a little 2 or 3 inch CPU fan, but the larger PC Case fans, 4-5 inches). I have used them in 20 cubic foot cabinets very effectively... :thumbsup: they do have them that run at 100 cfm and up. that would effectively change the rooms air out about once a min... of course that is assuming the little fan could effectively cover the entire room and not just a portion of it.

the C02 idea i like, but this room will have to cooled. temps can go to 110 degrees here in the summer and down into the 20's in the winter. i just see no way around some kind of temperature control.

the carbon scrubber exhaust on thermostat and backdraft stopper on the a/c duct work are idea's to consider. however to keep a negative pressure in the room and i think i must do that because of pumping A/C into it, i am not sure if either of those ideas would work.

but hey with that said, i appreciate your idea's... if you have more let me hear them... this is the time for idea's and brainstorming :jointsmile:

i really want to do this room up correctly... btw, i am planning on creating a hidden door disguised as shelving to completely conceal the existence of the room... the hidden door will have an electro magnetic lock on it that is controlled through a programmable remote keypad