...look at heating systems! We just took an overnight trip to Garnett Hill, a old cross country resort in the Adirondacks, and I'm checking out the heating distribution. Each room had its own thermostat and had FAT-finned baseboard that also had a return pipe. Kept the drafty room plenty warm even though it got down to 5 or so, and that's balmy for up there. Four-inch baseboard has to help. Plus, the end caps of the baseboard had hinged covers which revealed at least on coin type air vent.