Thanks for sharing this, Happyflowerlady. I had seen a "system" for sale last winter that looked very much like what you were talking about here. I didn't want to pay that much to find out if it worked, but this is affordable enough to give it a try. This is a great tip, and it would be very useful during a power outage as well. Also good for those times when it's just a bit chilly and a sweater isn't quite cutting it, but you'd rather not turn on the heat.