On 2005-09-22, PaPaPeng wrote:
On Wed, 21 Sep 2005 22:08:48 -0400, Brian E. Clark
wrote:

I have a very old, very large Bryant furnace (circa 1938)

How long do you expect to remain at this place? Ignoring
repair costs, just the savings in energy will justify
a new furnace over not too many years. This furnace may be
something like 60% efficient and replacing it with a
92% efficient furnace would mean of savings of 1/3 your yearly
energy cost. [Can someone give a better estimate of
how much he would save on energy?]

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