The pipe would only be a foot long or so, I'll definitely test the temps before installing. Already planned on making it removable for cleaning, (and getting some industrial sized pipe cleaner to help with it.). I plan to use a 1" or 1.5" PVC with screen protector over top end to keep lizard/bugs/substrate out of the pipe. I'm thinking to install it underneath to take advantage of the laws of physics. Heat rises. Humidifying with warm vapor, it is most efficient to do so from the bottom up, rather than the top down. I'll have to run a few tests, and figure out what would work best.