Sunhut CO2 question

[adahars37]

So here is my delima, i've got a sunhut. my setup is as follows
canfilter->6"inline fan-> ducting to cooltube w/400 watt-> exhaust cleaned and hot air out. i've got a 4" inline for fresh air intake on the bottom corner opening. i want to add CO2, i've used it in the past and liked the results. now everythings on the small side and i've got this sunhut. i'm using a cooltube for the summer and MUST vent the hot air. So how can i set up a CO2 tank efficently without having it all sucked right out of my hut via the canfilter->6" that is cooling my light. i've drawn up a million different things and seem stuck with using the cooltube, or having CO2 setup. not both. any suggestions or anyone that has set up CO2 in a hut PLEASES PLEASE any info is greatly appreciated.

[stinkyattic]

Go 'sealed room' and do an exhaust ONLY for the light, completely sealed from the interior. You will then have to play with cooling. There are portable ac units that haver the potential to be ducted, and those are a possible solution.
Look for a thread by Tranoble about sealed rooms.

[adahars37]

thanks stinkyattic, i've managed to get things where they need to be.