A couple years ago when I put my cabinet together in my basement, about 80 cubic feet, I committed to a 4" system: an open air hood (400w hps/mh), a 4" 170cfm fan, a filter corresponding in size, 4" ducting. Now I want to upgrade my hood to air-cooled, and upgrade the light to 600w. The new hood would be 6". Can I stick with 4" filter/duct -> increase to 6" hood -> decrease back to 4" duct to 4" fan -> exhaust? Or do I have to reconfigure the whole system to 6", which I don't want to do: more expense (for a new fan and ductwork--I need a new filter anyway) and less room in the cabinet for growth.
Thanks for your ideas.
Thanks for your ideas.
