Thanks tranoble. I can only find a co2 generator with a pilot light over here in Europe. Its not a big deal really since the generator will be in a concrete garage next to the growroom. The model I'm thinking about is a 4Kw model. Thats already a lot of heat and the next model up that I can find is a 11Kw which would be like a furnace in my garage.
I've calculated that the 4Kw co2 gen. (with a flow of 2 lbs. of co2/hr.) will bring my room up to 1800ppm in 30 minutes given no leaks and no consumption. What do you think about co2 consumption ? The room will hold approx. 200 plants which I intend growing to about 3 feet by harvest time. I also intend pruning such that I have 4-5 main branches on each plant. My objective is 2 oz. per plant, which I can just about achieve without co2.
So, Tranoble, 2 questions :
1. Given your experience, how do you think the co2 will go in my room ? I'll be using a co2 computer to keep the ppm at about 1800, with a refill point at 1500ppm. I'm trying to get a feel for how much 200 plants will consume. If its the case that the co2 ppm is rapidly diminished and the generator will be on for all of the time, then I'll need to rethink my co2 plans. BTW I've virtually no leaks in the room. Pretty well sealed.
2. Figures of 25-30% increase in yield are bandied about when using co2. What do you think it is ?