Residence is 1750 sq ft, 2 story cape cod with full basement northeast of Philadelphia.

Looking into replacing 26 year old Whirlpool gas furnace 75k 90% Aflue model
NUGK075DG01, and 2.5 ton Whirlpool condenser model NCAFA29VB02. It has
been (and still is) a great unit. I would like to replace with a unit that lasts as long
and is as trouble free.

I am in the process of cleaning / sealing ducts. In cooling mode the upstairs air exiting the registors are 3-5 degree warmer.These ducts go up an inside wall and across the ceiling. They are also the longest runs. Currently these ducts have a 90 degree transition from 7 inch round to 7 inch oval via flexible nsulated duct. I plan on replacing with a metal 7 inch oval to round elbow duct.

Whole House Load Calulator
TD: Cool 16 Heat 59 Sq. ft. - types 1 and 2 shading Sq. ft.- types 1 and 2 shading Sq. ft.- types 1 and 2 Sq. ft.
Outside Wall: NE & NW 1: 528 2: 410 Windows x 1: 109 2: 45 Glass Doors x 1: 2: Doors 24
Outside Wall: SE & SW 1: 528 2: 450 Windows x 1: 45 2: 15 Glass Doors x 1: 2: Doors
Floor - (linear ft. if slab) 1: 1088 2: 700
Number of Appliances 2
Number of People 4 Fresh air recommended: 49cfm --> CFM 100
Conditioned - Sq. ft.: 1750 Cubic. Ft.: 14000 Construction:good Duct system:
Calculate Load
Total Btu's Cooling 28432 Sensible Load 24204 Latent Load 4228 Total Btu's Heating 68089

Estimate 1
All options include new lineset, condensate pump, small bypass humidifier, humidistat mount, media air cleaner cabinet and filters

Option 1 Carrier Condenser 24ABB330 2.5 ton 13 SEER, coil CNVP3617, gas furnace 92.1% Aflue 75K Btu output 59SC2B080S1716, Carrier Edge thermostat. 10 year parts, 5 year labor, lifetime heat exchanger, 10 year compressor.
$7,969

Option 2 Carrier Condenser 24ABC630 2.5 ton 13 SEER, coil CNVP3617, gas furnace 96.2% Aflue 78K high stage, 50K low stage 59TP5A080E1716, Carrier Edge thermostat. 10 year parts, 5 year labor, lifetime heat exchanger, 10 year compressor.
$ 8,915 EAP rebate $500 Final $ 8,415. Also qualifies for $300 PECO rebate, federal tax $300.

Option 3 Carrier Condenser 24ANB630 2.5 ton 13 SEER, coil CNVP3617, gas furnace 96.2% Aflue 78K high stage, 50K low stage 59TN6A080E1714, Carrier Edge thermostat. 10 year parts, 5 year labor, lifetime heat exchanger, 10 year compressor. Carrier Infinity Controller Model SYSTX thermostat 10 year parts, 10 year labor, lifetime heat exchanger, 10 year compressor.
$ 10,127 EAP rebate $500 Final $ 9,627. Also qualifies for $300 PECO rebate, federal tax $300.

Estimate 2
Carrier 1 Stage/ ECM blower 96.5%AFUE Gas Furnace (59SP5A080E17-16) set on blocks and a new media air filter on the return drop. Install a new Aprilaire bypass humidifier on the return drop, Carrier N-Coil (CNPVP3117ALA) ,Honeywell Digital Set back thermostat (PRO6000) , Carrier 16 Seer AC condenser will be placed on a new condenser pad with a gravel base, new copper line set between the condenser and the new N Coil (on top of the furnace). ARHI# 4744732 (according to ARHI# 4744732 condenser would be model 24ABC630A**30)
Warranties are as Follows: 1-Year Parts and Labor
2-5-Year Carrier Limited Parts Warranty (No Labor)
6-10-Yr Extended Warranty on Carrier Parts w/Customer Registration within 90 days of install
Price: ($7,938.00)

This installation qualifies as a qualified system for the federal tax credit of up to $500.00 cap allowance. This installation also qualifies for the PECO Smart Home A/C Rebate of $300.00. Federal Tax Credit: $50.00 advanced blower +$150.00 95% furnace +$300.00 16 SEER AC = $500.00 total cap
Peco Rebate: $300.00 95% furnace + $300.00 16 SEER AC = $600.00 total
Total Credit and/or Rebate: $1,100.00

Estimate 3
Option 1 Carrier Perfomance Series 95% gas fired furnace 59SP5A008E17-16 with ECM motor, one Carrier Comfort Series 16 Seer 2.5 ton condenser 24ABC630 with matching air handler CNVP3117, digital thermostat. Includes 4" Media cabinet, new line set.
10 year limited manufacturers warranty on parts on furnace, A/C, and coil.
$ 6, 025.
Rebates: $ 300 PECO Rebate A/C, $300 PECO gas, $100 PECO fan $500 Fed tax credit
$6,025 - 300 - 300 - 100 - 500 = $4,825

$600 for 5 years labor warranty on furnace, condenser, and coil. (must sign up for yearly maintenace at additional $$)
$1100 for 10 years labor warranty on furnace, condenser, and coil.(must sign up for yearly maintenace at additional $$)

Option 2 Same as above but upgrade condenser to Carrier Performance series 24ACC630.
Add + $600 .

Option 3 Upgrade to Infinity 96% two stage variable speed furnace 59TN6A080V17-14.
Add $600 - Additional instant rebate $100 Carrier cool cash.

I have a contractor that wants to estimate for a Rheem system. Should I consider or stick with Carrier?
Carrier coil should I make sure aluminum coil ALA is speced, ie CNPVP3117ALA ?
First estimate speced coil CNVP3617, said it was to get higher SEER...if so how much at what cost?
Third estimate seems to have done best job on finding rebates, and best price.
Should I consider labor warranty?
Comments on Aprilaire bypass humidifier vs Carrier. From what I read its best to install on return drop.
Honeywell Digital Set back thermostat (PRO6000) vs Carrier Edge?
Estimate 3, I need to get specs on digital thermostat, especially if upgrade to Inifinity, also need price spec on humidifier.

Appreciate any / all comments on selecting a replacement system.
Is it better to do now or wait till fall?