So, I'm in the middle of a bathroom gut and re-model. The reason for all this started with paint peeling off the ceiling because my son who's 13 feels the need to turn the bathroom into his personal sauna and 95% of the time won't turn on the bathroom fan to exaust the humidity. By the time he's done with his shower, not only does a cloud of steam emerge from the bathroom when he opens the door but the walls are dripping wet. Needless to say that little paint peeling has gotten me to look at the bathroom as a whole and I just got a wild hair to re-do the whole thing and make some upgrades.
The reason for my post is I also need to remove the old ceiling fan/light and box (rusted almost all the way through it's that old) and replace it with a new one and will be putting in a 100 or 110 CFM fan / light combo. What I want to do to fix my son's rear end is put a motion detector switch with a timed delay of 10 minutes before going off (don't want it to have a manual override either). The motion detector switch should turn on both the fan and the light at the same time and of course, turn them both off at the same time as well. This will serve 3 purposes... 1) stop my son (or my daughter) from taking a shower and not having the fan running during the shower, and #2) give them a 10 minute timer when the fan / light shuts off telling them to get the heck out of the shower (I'm always yelling at them to get out cuz they like to stand in there for 30 minutes sucking all the hot water out of the tank and running up the water bill). They'd simply be able to have the light come back on by waving their hand above the shower curtain so I don't see this as being a safety problem either. #3) save electricity since the kids also like to leave lights on even when they're not in the room.
What I'm wondering is, are there any products out there that would work for what I'm looking to do and if so, a link to where I might pick one up?