It’s too cold to work on Sparta right now, so I thought I’d add another blog entry in the toasty coffee house nearby. While wrestling with Birch issues, my bathroom ceiling fan showed up from www.etrailer.com. I will be using the existing roof vent but, outside of that, the whole thing is a hokey work-around – buying parts at Home Depot I made it to fit. Check it out: 12 volt naturally and only 200 cfm. OK for all but the worst blowouts.