On Fri, 5 Mar 2010 09:15:06 -0800 (PST), Rob Kiz
wrote:

My furnace is 21 years old and I am thinking of replacing it this year
to take advantage of the $1500 tax credit and hopefully save some
energy cost. The AC is the same age and would also be replaced.

The furnace is a Carrier Weathermaker Infinity (58SXi) and has an
Annula Fuel Utilization Efficiency rating of 94%.

The furnace runs fine. Outside of a rather expensice blower motor
replacement 10 years ago, I have had no problems.

I can't see getting a new furnace that would be much more efficient
than the current one, so no savings there. On the other hand, it is
pretty old and will eventually have to be replaced and I hate to miss
out on the $1500 tax credit.

Thanks in advance for your opinions on this.

Rob

I'm looking to replace my 12 year old units. (HVAC)

I have a 30% tax rebate coming for 2009 tax year for one brand new
garage door.

Anyway, I read this.

*
"The central air conditioner also needs a blower motor—which is
usually part of the furnace—to blow the cool air through the duct
system. The only way to ensure that your new air conditioner performs
at its rated efficiency, is to replace your heating system at the same
time. It’s especially recommended if your furnace is over 15 years
old. If you purchase a new energy-efficient air conditioner but
connect it to an older furnace and blower motor, your system will not
perform to its rated efficiency."

http://www.energystar.gov/index.cfm?c=home.index