inline fan with fresca sol?

forgive me if im retarded... some what noob here.. if i have a water cooled light and use a water chiller, do i still need to use an inline fan? isnt the point of the water cooled fixture and the chiller so you dont have to have air leaving the space and so it stays contained.. am i right?
thanks

Unless you are supplementing with CO2, you must use an inline fan to exchange air in the grow room. Even with CO2 you have to vent from time to time.

A sealed enviroment would require the introduction of Co2 from an outside source. If your goal was just to keep your temps down, then you can just exchange the minimal amount of air to keep things fresh in your space. Your plants do need fresh air but just a little exchange will do it.

Check out my sealed grow, I use a fresca, chiller, water cooled co2 and only exchange the air in the box when I open it every night to check on them.
Stop by and check it out, I'd be happy to answer any questions.