I posted this same question in an earlier post that was probably way too long and involved. Anyway I'm considering a new furnace and have narrowed my choice between the American Standard 90% 2 stage variable speed and the Amana 96% 2 stage variable speed. On paper I like the warranty of the Amana furnace better and the fact that Amana uses both primary and secondary stainless steel tubular exchangers, I feel the furnace replacement warranty speaks volumes about Amana’s confidence in their exchangers. On the other hand I like the reputation of the American Standard brand better, but I am very nervous because in my eyes American Standard’s primary heat exchanger is very similar to the aluminized steel stamped “clam-shell” design that just failed on my “good reputation” Carrier furnace and it seems like the labor bill to replace the "under warranty" exchanger took away the option to fix, I do not want to be in this position ever again. The American Standard is slightly more expensive than the Amana but I am going to say negligible in my case the price difference would not sway me either way. Am I missing something does the American Standard’s 90 2 stage variable speed furnace have some capabilities in terms of operating logistics or features that set it apart from the comparable Amana? I understand the blower motors are expensive on both these furnaces to repair, does one use a significantly superior blower than the other or are they comparable? Is there Anything else I’m overlooking on my comparisons? Which is the best way to go???????