I am interested in dual fuel (Hybrid) heat pump either Lennox 15XP15, Carrier Infinity 16 with 95% AFUE eff gas and or Trane 15 XL 15i with 96 gas furnace. What do I need to bring to the table when I start comparing systems? Do I bring a set of plans in with the R-factors for window types a doors (solid wood or hollow core) as well as the R-factors for the walls, floors and attic. I may change what I use for insulation but keep the R- factor that I provide the seller/installer constant. I am aware of the maunal J cals but what do I need to bring and ask for my first talk? I am building my own house. House is main level (2295sqft with a walk out basement same size and we will live on main level most of the time Family visits and daughter live in LL(until college in 1 year).

Lisa