I do not know how you will be able to run CO2 efficiently with the constant exchange of air in the room. The one good thing about CO2 is you can run temps of 90 safely.
I don't have a constant exchange. The co2 is one of the main reasons I use a tent vs just growing in the room itself. I can easily seal it up and run it fairly efficiently. I have a temp sensor that vents the hot air out the top of the tent and sucks cool air in the bottom. I don't see co2 coming my way until next "season" unless money starts growing... in my tent
It does but it cools the room that the tent is in. I keep the outside room about 70 and when the tent hits 80 it dumps the heat out of the tent and sucks in the cool air. So there is some exchange from the room but fairly minimal. The two vents take care of 85% of that issue.
Most of the lost air is sucked from outside of the room to the inside. One of these days I'll get off my lazy butt and post some pictures. Until then I chose to confuse everyone with my stoned ramblings.
"I was born a rambling man. Trying to make a living while growing the best I can."
Well with CO2 you can run temps of 85-90 with no ill effects. I thought I would be exchanging air more often but with my hoods being aircooled I was exchanging the room about once every three hours. I used about 20lbs of gas during 9 weeks of flower. Not to bad considering it was the only thing I did different on my last grow and added a little over a pound to my final weight.
Co2 is very important for sizable grows (2000W+) i started using a CAP gen-2 propane generator - immediately saw explosive growth. the generator produces heat and humidity, so u need the AC, but is inexpensive to run.
First grow was a little over 2 lbs under 2000w in 49 square feet. Second grow just under 4 lbs. in the same area same set-up nutrients and strain. My third grow is purple power so we will see how this first run of these goes.