heres the venting of the room through the lights to the inline fan thats mounted to the wall to outside,using ac air to cool the lights,room still stays 75 even 100F outside.i need to buy new ducting next round,this stuff 7 yrs old,lol.advatage of air colled is setting the lights 10-12 inches from canapy during flowering meaning larger tighter buds,with no heat stress ,ac and fans pass under the light anyways.plants seem to like it.
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