oh! and the quote I got is $4800..

Questions if you can answer them:

-1- I believe you have the consider model number wrong. It's probably the 2TTR3042A1000A. And if that's the case, why not consider R-410A refrigerant since R-22 is being phased out?

-2- The ARI-matching coil is the 2TXCB025 (note the B after 2TXC and not the C - this determines the width).

-3- How was the furnace and air conditioner sized? Did the dealer do a load calculation to determine sizing? Oversized equipment is not efficient and has a shorter lifespan, and undersized equipment may leave you uncomfortable.

-4- What model thermostat? I would suggest Trane's TCONT802 or TCONT803, or maybe even the Honeywell VisionPRO IAQ if you choose to go with the variable-speed blower.

-5- Have you considered a variable-speed furnace? That combo is rated at 14 SEER with the model numbers I posted above, but the variable-speed blower is nice to have.

You might have to address these questions to the quoting dealer.

Thanks ryanhughes for your input.

Both the model numbers you had guessed are correct. As per the size of the furnace and air conditioner, the quote is merely for replacing what was in the house previously. I will for a load calculation to see if the sizes are still valid. I will also look into the variable-speed blower.

Is PVC pipe venting an issue hence the 90% furnace being quoted? Have you considered upgrading to a higher-efficiency XL15i air conditioner (or perhaps even heat pump for a dual fuel setup or just straight heat pump with no gas heat)? When matched with a new furnace you get a 10-year warranty on parts. Ask your dealer about this.