On Sat, 24 Nov 2007 20:19:38 -0500, "Eisboch"
wrote:

I am insulating windows and trying to heat with space heaters set at half
their max wattage. At some point the water will be too cold for extracting
heat.

That's a good plan. We've added a lot of weather stripping and it's
made a big difference. West Marine sells a nice little electric space
heater with a thermostat that works and a variable speed fan.