ok so if i run say like a 500cfm inline fan for two cool tubes ran in series (both straight in the same line, with a bit of sag while light is in a lower position) and the inline fan at one end of the duct pushing air out not through the tube right? or would it be more efficient putting it between the two cooltubes? only one 1kw light will be on at atime since they are going to take turns on 12/12 (one on while the other off)




ALSO, do I need to vent the air of the box 3 times a minute with the cooltube or is that only if the heat of light is directly released into the growbox?
bloodbrother Reviewed by bloodbrother on . Question about cooltube and room ventilation Ok so I am thinking of using cooltube for 1000W HPS like a 200-300 cfm fan with maybe 4 feet of strait ducting... so if i were to do this what kind of exhaust fan should I have for the room 4ftx5ftx6ft? Like do I need the 3 times the volume of the box exhausted per minute even though I have the cool tube? Rating: 5