How Much Ventilation?
I have a 120 cubic foot storage room. I want to try growing some small determinate tomatoes in it under lights. Would a 65 CFM bathroom type ventilation fan with 3" ducting provide suficient air exchange for photosynthysis?
65 CFM X 60 minutes = 3,900 CFH
That would change the air 32.5 times per hour if i'm doing the math right.