I have gotten a ton of great advice here and am all set to start a replacement tomorrow morning.
I am getting a carrier infinity system, the only challenge now is sizing.
The salesperson did run a manual J, and the recommendation came back at an 80k BTU furnace (this is replacing a 100k).
Here is where it goes a bit sideways,
We were all set to go for the 2 stage 96% unit and he called me on friday and said I need to look into the new 3 stage that they just got in the past week. I had heard about it here and it sounds like it would really be good for our application (2 zones, one 700 SQ feet, one 1700 sq feet) but the sales guy wants to go back to the 100k unit because he didn't feel the smaller unit would ever go to the third stage.
Does this sound normal? I am comfortable with everything else that I have heard from this company, just want to make sure that I get the right sizing.
I am leaning towards the smaller unit simply because it would be right for our environment. Does the infinity zoning change the sizing at all?