Question for anyone who might have some suggestions for where to start to solve this problem. We have a bilevel home with a garden level basement. Our problem is that the temperature varies drastically between our top level and lower level. In the winter, its nice and warm upstairs, and freezing downstairs. If we try to bump up the heat, it is boiling upstairs and just lukewarm downstairs! Same in the summer--the a/c all "sinks" to the lower level and it is frigid down there.
One suggestion that I know works is to put up a plastic shower curtain at the entrance to the lower level--but it is SO ugly! We need to solve this problem soon, because we have a baby on the way whose room will be downstairs and I don't want it to be freezing down there!