I have a waterproof enclosure that will hold (2) Rays 27ch DMX controllers and a Mean Well 12v/50a SE power supply (has a fan). This enclosure will be sealed and sitting on the ground. Unfortunately, I live near Chicago, so have to deal with rain, sleet, snow and water. This is not a problem for the enclosure, but I am worried about ventilation for the power supply. I don't want a 1meter snorkel sticking up, and thought about making a twisty turny P-trap, but while walking through Menards to get ideas for various projects, I found myself in front of faucet aerators and shower heads. Soooo, I figured I'd throw out an idea to see if anyone can see flaws. I was thinking about putting a cheap shower aerator on as a vent, angled slightly downward. If that doesn't seem like a good idea, what about a simple 90 degree vent (PVC elbow) with a sink aerator? Will either of these keep the guts nice and dry whist sitting on the ground through a Chicago winter? One concern is that the aerator ices up and gets blocked. Another idea is to make a p trap inside a p trap. The inner pipe has a bunch of holes while the outside is open on the end. How would you go about creating a vent in an on-the-ground waterproof enclosure?