Nothing I guess other than if your piping through a room that is full of light, like a veg room and into a flower room, the light will shine like hell through that pipe. Especially the thinner it is. I use flexible ducting wrapped in black plastic.
PVC works fine - it's only real "downfall" is that it's a rigid piece of pipe. The flexible style venting easier to maneuver if you have to go around things in your grow space.
Thanks, StareCase. Its rigidity for my setup is its strength over flexible ducting. Good to hear that everyone else uses it just because of that and not some chemical leaching of PVC under light, or something.
Thanks, StareCase. Its rigidity for my setup is its strength over flexible ducting. Good to hear that everyone else uses it just because of that and not some chemical leaching of PVC under light, or something.
