All you need is a vent with a top, make sure the edges of the vent are raised 1/4" or so above roof level. Then secure a top that will overlap the edges of the vent a couple inches....you could always install a fake air register and pull air from the bottom of the attic through it also....you could also just use a vent that looks like an upside down J with the intake pointing toward the roof top.

Many options....don't forget to seal it up good.

Unless you have a large operation then don't worry about choppers, if that's too much to deal with for you then consider another hobby.
Cyclonite Reviewed by Cyclonite on . attic grow hi, im planning on starting an attic grow, but i have been trying to think of ways to make it as stealth as possible. so since the helicopters scan for heat using ir (infared) beam that cannot pass through led. could i get led tiles on my roof and be invisible to the helicopters? or line the inside of the attic with somee form of led? thanks for any help Rating: 5