mightymouse12
Active Member
sorry for posting this twice but i posted it in grow room design and then relized there werent that many people viewing that section.so my question is I am building a new grow box tomorrow since my wife wants the closet back. it's going to be 2.5' wide, 2' deep, and 6' tall. my last few plants have already bean veging for a while now and will be switched to flower as soon as the box is done. i'll be flowering with a 400w HPS. and was wondering how many cfm my exhaust fan should be? thanks for any advice.