Toohighmf
Well-Known Member
It wasn’t around back then. This is from 2005-6. Insulated ducting was pretty new in 6-8” diameters back then. The 3/8” thickness of the 18” PBT rigid duct collars collars we made insulated pretty well. With 450cfm per 3 lights and virtually no bottlenecks, this room ran pretty damn cool considering! Hanging the lights 16” from the canopy didn’t hurt either. The only way to get around the inverse square Law and glass...Nice grow with the tubes. Ever thought of switching to thermaflow or other insulated ducting? It will reduce heat radiating back into the room.