2 stage vs. 3 stage furnace
I have gotten several bids for replacing our furnace and have narrowed it down to the best two.
The first bid is for a Trane 2 stage, variable speed, 95% efficient model. It comes with a new programmable thermostat.
The second bid is for a Carrier 3 stage, variable speed that is also 95% efficient.
I understand that there is a great deal of difference between a single stage and a two stage, but I am unsure if there is a great difference between a two and three stage. The second bid doesn't come with a new thermostat, but the one we currently have is digital and seems to be in good working order. The bids are within $5 of each other. I would appreciate any insight as to which is the better buying decision. Also, I realize that the person who installs the system is the most important component. Both companies have good ratings from the BBB, and the reviews I can find are favorable.