Natural gas/LP is used to produce CO2 in GREENHOUSES.
NEVER EVER attempt to do this in an occupied building.

Furthermore, this thread is getting weirder than weird-
You are trying to run a giant cash-crop cycle and then move?
Honestly the questions you are asking are making me think you don'thave anywhere near the expertise or experience to pull off something like this.
Start small.
Remember the parable about the greedy crow who gets his head stuck in the urn because he refuses to drop the GIANT mouthful of grapes?
You're biting off more than I think you are prepared to chew.
stinkyattic Reviewed by stinkyattic on . NEW SETUP QUESTIONS finally i moved into my new house. i got a huge basement and i wanna do this up right. i went to canada got myself like 100 high quality seeds(thanks ontario seed bank) and now its time to set up the room i;m thinkin 6 600w MH during veg and 6 600 HPS during flowring my room is 15ft wide 28ft long and 7.5ft tall... i am gonna throw a 10,000BTU ac down there and i wanna set up some sort of ventilation. let me know any advice or input on the lighting and if u think the room is large enough Rating: 5