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Tony Hwang

wrote:
On May 27, 10:58 am, Ed wrote:
On Sun, 27 May 2012 08:34:31 -0500, Bill
wrote:

TIA
I have an Affinity 93% furnace. It is a lot better than the 30 year old
one that it replaced. The biggest problem I have with it is that the
blower is noisy. It runs noisy and it is noisy starting up. Starting
up it makes a kind of a squawking noise, then just general blower noise.
I could wish that it was quieter, particularly since the closet is
right next to my bedroom.

Bill

Belt drive? I'd check the tension and maybe put on some belt dressing
to eliminate the startup noise. I'd also check to see if it can run
at a slower speed and still do a proper job for you.

Not likely a belt drive in a 93% AFUE furnace.

For Tony's question, don't have any experience with York.
But I wonder how much more the 98% modulating furnace
costs than one a step down, say 94%. I'd wonder about
the increasing complexity, more things to go wrong, cost,
etc vs a little improvement in efficiency. In particular I
don't see the need for an infinitely variable moduating
furnace. It would seem two stage gets you most of what
you're gonna get anyway. I guess if you're not paying
anything much for it and you're not worried that it may be
more complex than a simpler system to diagnose, fix,
etc. then maybe it's OK. I went through that analysis
couple years ago and went with 2 stage, 94%.
Hi,
I am thinking the same way after looking around and talking to my BIL
(commercial HVAC engineer) Off the bat Carrier performance series 2
stage with ECM blower is a grand less to begin with. When we did the
manual J, my need is 98,000 btu so I am going for 100K btu with little
room to spare. Litle lesser cost, another 500.00 or so is Goodman.