Search the grow boss’s videos on YouTube. He seems to specialize in making videos about venting bc it Is a major issue no matter the season, place, etc. I recently watched his videos and was going to set up and extra inline fan to pull fresh cold air from outside,while the heat is being ducted out the other side...but I guess it is counter productive to run fans like that. Also, a mind blowing tip that seems like common sense, but not for me anyhow,...was that fans dont technically cool down your tent/room. They remove air. I didn’t explain that too well, but basically he was saying that using multiple fans are buying extra large fans usually lead to a disappointingly outcome. It seems the way to go is to keep it a “sealed room” environment,..but that would mean supplementing extra co2. Do those cheap 30 $ co2 tanks and bags actually work for a sealed room. Hopefully someone learned something ha