Comparing HVAC quotes - help appreciated
I live outside Philly in a 2600 square foot three level house (including finished basement). We are replacing a 25 year old carrier furnace and a 14 year old 3.5 ton carrier AC. Duct system is underneath ceiling of finished basement. We have double paned windows downstairs and the insulation of the house varies (very good in basement which is new). We've had the HVAC serviced twice/ year since we moved in 5 years ago.
Last weekend the AC went. We have been considering upgrading the system anyway, so looked at this as a good opportunity to get a more efficient system.
We have received 3 quotes so far (one more coming tomorrow) and would appreciate any feedback.
Carrier MEC 2 stage variable speed furnace (Performance 95)
Carrier 15 SEER AC system
Coil (no description)
Thermostat (no description)
$10,942 ($10,067 after rebates/ tax credits)
Trane XV95 Gas 2 stage variable speed furnace (120k BTU)
Trane 16 SEER 2 speed AC (4TTX5049)
Thermostat: TCONT602 Programmable
$10,217 ($9,817 after rebates/ credits)
Ruud 95% 2 stage variable speed furnace (Model UGRM-10EZAJS - 100k BTU)
Ruud 3.5ton 14.5 SEER AC (410A refrigerant)
Coil: Matching Ruud
Thermostat: Honeywell digital
$7,550 ($7,150 after rebates/ credits)
Quote #1 and #2 looked to me like they were just seeing how desperate we would be during a hot week. Quote 3 is most attractive due to price and references of contractor.
That said, always wary of the quote that's substantially less and I don't have good experience/ visibility into what the right price should be.
Any feedback in terms of questions I should be asking would be much appreciated.