"Meat Plow" wrote in message
...
On Thu, 04 Oct 2007 23:27:01 +0000, wrote:
I'm sure they love the idea of selling me a new furnace even if it isn't
really necessary at this time.
Wondering if other metal inside the furnace were to crack and it weren't
the
heat exchanger cracking per se....would that require furnace
replacement?
Main concern for safety is the heat exchanger. A crack or weld leak will
allow CO from the combustion to mix with the heated air. Not much other
metal that would crack or such.
Maybe you need to look at a induced draft, inshot burner type of furnace.
Things change over the years.