We have lived in our single story home of about 1600 sq ft with a walk-out basement near Kansas City for 15 years. It has a GE 150,000 btu furnace and Janitrol 4 ton AC that are both approximately 30 years old. They've worked well for us but have required increased maintenance the last few years and we've decided it's time to replace them.
We've used the same small local company for regular preventative maintenance (as well as the occasional emergency repair) and they have done a great job of keeping these systems going. We want them to do the replacement. They came out and did a load calculation and advised that we should go with a smaller furnace and AC. They sell Amana and made the following recommendation.
ASX14042 3.5 ton 14 seer
AMH80905C 80% 2 stage 90,000 btu
matched cooling coil, TXV, line set and base pad
Aprilaire #8466 thermostat
(They originally recommended a 95% furnace but our house is rock and there is no easy way to run the pvc out of a wall.)
There is a lifetime warranty on the furnace and AC (original owner) and 10 year parts and labor.
Does this system seem to be a reasonable balance between cost, quality and efficiency?