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Unregistered
05-29-2011, 08:55 PM
I am new to this so I am just trying to understand how you should set up hps cooling ducting. I am making a small grow room and I want to know if the two 6 inch vents that come off of the side of my light housings just go to the outside atmosphere or if I am supposed to put an in line fan on one side so it has forced air past it? Sorry in advance if this is a stupid question, any help would be greatly appreciated.


Thanks,
Justin

willard3
06-05-2011, 05:56 AM
It would thermosiphon if you connected both holes to atmosphere, but a fan is required to increase the heat transfer.

Air in from outside.........lamp...........fan..........air back to outside

willard3
07-26-2011, 01:57 PM
http://img.photobucket.com/albums/v510/willard3/spam1.jpg