On Mon, 15 Nov 2004 07:27:23 -0600, (m Ransley)
wrote:

2 stage usualy heat more evenly, yes there are more things to break,
but it will not save on utilitys. If you spend alot on heating get a
93%+ efficiency unit not 80%, which you may have now. Closing down all
dampers can be bad for your furnace, overheating it, there is a limit to
what your system can take, ask your instaler.

I was thinking of getting anything middle of the road, not top of the
line and not the most basic. ANything 90percent and higher would
require more labor not to mention the larger jump up in price, for a
vent and duct that takes air from outside.