I have a 26 year old Duomatic-Olsen furnace. It's a condensing furnace and is about 90% efficient. Single stage burner and only one fan speed. I replaced the blower motor 2 years ago and the combustion blower last year.
I am looking to have a new Bryant 355CAV with the Evolution control installed because of the age of my existing furnace. I am having difficulty justifying it though because of the high efficiency of my existing unit. The $1500 fed tax credit is what is really making me take the plunge. Thoughts about replacing? Yes or no?
I have a similar aged A/C by Rheem, it's a high-efficient unit also, and I am currently planning on keeping the old A/C. I live in Wisconsin so if the A/C croaks one day it's not as desperate of a situation. However, the furnace going out when it's 0 degrees out is another matter. Thoughts?