I ran the same strain for years, then added co2 and sealed the room, same everything except I put the glass on the hoods I had and added my co2 setup and bang, 20% more yield, did that for 2 more grows, stopped co2 and lost about 20% yield. So now for the last 5 years, I've been running co2 because it obviously works. I've been invovled in agriculture and plant life for over 30 years now. I dont need a scientist wearing a lab coat to tell me that it fucking works.
Now co2 may or may not work with the OPs plans as far as ventilatin and whatnot goes, but thats not what I was addressing. You made the comment that co2 didn't increase the yield enough to make it worth it AND that it was complicated, so I called bullshit on your ignorance.
I've actually done alot of fucking around with co2 and temps, humidity, etc. I don't just get on here and regurgitate what I read on some other thread.
Sentinel CPPM-4. Ran me about 500 2 years ago. Im sure you could find a nice clean unit on ebay or CL or like. I keep my temps at 86-88, 1200ppm co2 and 40-45% humidity. I tried both with co2 and without co2 doing grows anywhere from 75-90 degrees over the years. When I wasn't running co2 the ideal temp range was a tad lower, being 78, again without c02.
