Oversized on quote #1 especially on heating. No more than 80 K should be sufficient. Going up in size especially when not necessary can create another issue. Can your ductwork system support the extra CFMS going from a 3 ton to a 4 ton.

What model evap coil installed? I would like to check to see if this is an AHRI match.

While great equipment, I don't like how this dealer put this together.

Was a filter cabinet included? New refrigerant lineset included? New two stage thermostat installed? This would be a must to keep you off high stage because you would rarely if ever need it.

Yes, I think the pricing is too high but more concerned about the reasons for your comfort issues with old system plus the sizing of new equipment.

IMO

I asked American Standard Quote #2 multiple times if the ductwork can support the system and he was vague in his replies. However, last year I had the ductwork enlarged due to low flow issues.

I do not have the model of the evap coil.

A new seven day programmable 2 stage thermostat is included. Presumably two stage.

There is nothing on the quote about a new filter cabinet. Old lineset is behind wall and will be reused.

If it is an overpowered Platinum XM Multi-staged 4 Ton 18 SEER Condenser and Gold SV 80 AUFE 100,000 BTU dual stage furnace won't it just run on a lower stage and be fine?

Has this system been installed yet?

I would drop down to the 80K furnace size with 4 ton rated blower.

What is thermostat selection? Mdl number please.

I would also ask him if your existing lineset matches to correct size to the manufacturer spec for the 4 ton condenser. Highly doubtful.

What is Mdl number of evap coil? Find out.

You need a pleated filter media box cabinet.

Push him. The more I learn, the more I don't like.

IMO

If the work consisted of just replacing the furnace and condenser then the quote is high in my opinion.

Did the contractor verify the old line set will support the new 4 ton AC condenser? Did he verify the duct work will support 1600 CFM of air flow? It is not good practice to increase sizes without a load calculation.

If you set the thermostat to be a constant temperature in the summer and winter then the equipment should stay in the low stage most of the time. It is not the way I would operate the equipment.

The system has not been installed yet. I spoke with him on the phone and got some answers in regards to the American Standard HVAC System.

1) The included thermostat is the ACONT802 2 stage thermostat
2) He is "99% sure" that my ductwork can support a 4 ton system. He will stop by in the next 24 hours to verify.
3) He is "99% sure" that my lineset can support a 4 ton system. He will verify when he stops by. If not, he will install a new lineset.
4) It is a matching coil. He did not have the model #.
5) A ? Filter Track Box is included in the quote.
6) Because the furnace is an 80% furnace, I am actually getting 80,000 BTU output, not 100,000 BTU.
7) Due to technical reasons, it would be difficult to put a 95% furnace in the attic (where the current one is located). It can be done, but would entail significant expense.

1.wrong thermostat-not a two stage model that controls staging. You will always go to high whether needed or not. Recommend HW Prestige IAQ that also offers dehumidify on demand feature for AC cooling.

3.you cheat the capability of new condenser and can cause trouble if lineset not the correct size to the AmStd specification.

4.find out coil model number,it should be best matching Trane/AmStd, not a 3rd party model which would be completely unacceptable. Post back.

5.what model filter cabinet?

6.you should drop down to the 80 K furnace size. Yes, I realize it is a noncondensing 80% eff furnace. Dealer seems intent on oversizing you.

IMO