You need to seal the room and run co2 with a dehumidifier and a sealed lighting system so you can cool the lights with outside air if they start to overheat the room. Otherwise, you will have to be constantly exchanging air and reheating the air that is brought in just to replenish co2.
Yeah.. I dont know if circulating cold air over hot lights like you say is a good idea.. Ive had problems with the fans stop and sieze from literally getting too cold from a direct intake from outside. Its always been easier to push hot air out.. I might have frost buildup on the exhaust, but it will fix itself pretty quick.
I guess I see it differently, i'm using waste heat from the lights to keep the room warm. So all I have to do is push hot air out and have it passively intake my leaky door and past the curtain. So i dont have to reheat the air like you said because I'll actually need cold air to make my setup work. Dont tell me bs like drafts are bad for the plants, Ive gone around with an IR thermometer and check temps on everything. Everything is where I like it.
Because I'm pulling in fresh when my lights are on this reduces my dehuey load, I'm able to run a peltier style dehuey and maintain my RH because of the low humidity of outside air. So I can run less power.
I guess I could fire up my co2 burner, but I'll just wait till it gets colder, I'm trying to conserve as much as possible. And I dont have a enough plant mass as of now to justify the added expense of fuel.
I know... whop de fucking doo.. we're noobs you're perfect.. get yer popcorn out.. yer laughing...