That transom window idea is elegant. I think it would work great. The two bedrooms in my home each share a wall with the bathroom so I'll probably just cut a hole in both walls, seal the sides, and put in vent registers. Your solution is the much more generic and more broadly useful for the average home.
As far as vent timers, the Panasonic whispergreen model I was thinking of won't require it. They're built to be run continually at user adjustable low settings. In fact, with the wall switch for it turned off you can set it to run as low as 30 cfm, and its supposedly built to run at that speed continuously.When you turn the wall switch on it goes to 80 cfm. It also has a built in timer that turns off the 80 cfm mode only and reverts it to the low speed mode. Pretty cool, all in all.
Also at 3.8 watts it only uses 91 watts in 24 hours. I can live with that.
Edit: Actually the more I think about the transom idea the more I like it even for my situation. Vents directly through the bathroom walls might end up being an invasion of privacy, if you know what I mean.
Last edited by Exeric; 12-17-12 at 03:00 PM..
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