AC and furnace replacement bundle prices
| Job | What's included | Typical market range | Fair price* |
|---|---|---|---|
| AC (3 ton) + gas furnace (80%) combo | 14.3 SEER2 condenser + matched coil · 80% AFUE gas furnace, ~80k BTU · Removal of both old units · Reconnect existing ductwork, venting and gas | $7,000–$14,000 | $10,500 |
| AC (3 ton) + gas furnace (96%) combo | 14.3 SEER2 condenser + matched coil · 96% AFUE condensing gas furnace, ~80k BTU · New PVC venting and condensate drain · Removal of both old units | $8,500–$16,000 | $12,300 |
*National base price before local adjustment and add-ons. Prices are current estimates while our provider network finalizes local pricing. Market ranges come from published contractor prices and national cost guides (sources). Updated October 2026.
| Option | Price |
|---|---|
| 3-ton AC replaced alone | $7,200 |
| 80% gas furnace replaced alone | $4,900 |
| Both, done as separate jobs | $12,100 |
| Both together (bundle) | $10,500 |
When to replace both
- The furnace is 15+ years old, or has needed repeated repairs.
- The furnace blower can’t move enough air for a new, properly sized AC.
- You want a single warranty and matched-system efficiency.
- You’re already paying for a permit and a crew visit, and doing both at once saves on a second one.
Efficiency options
| Furnace | Best for | Venting |
|---|---|---|
| 80% AFUE | Mild winters, lowest upfront cost | Uses the existing metal flue |
| 96% AFUE (condensing) | Cold winters, lower gas bills | New PVC venting and a condensate drain |
Not sure which suits your climate? See our furnace replacement guide. Furnace showing a blinking code? Check Carrier or Goodman codes first.
Frequently asked questions
How much does it cost to replace an AC and furnace together?
A 3-ton air conditioner with an 80% gas furnace costs about $10,500 at a fair price. With a 96% high-efficiency furnace, it’s $12,300. Booked separately, the same 80% equipment would total $12,100.
Is it cheaper to replace the furnace and AC at the same time?
Usually, yes. One crew, one permit and one visit cut labor, and matched equipment performs and is warrantied as a system.
Should I replace my furnace if only the AC is broken?
Not always. If the furnace is under about 10–12 years old and working well, replacing just the AC (with a matched coil) is reasonable. If it’s 15+ years old, replacing both avoids a second install soon after.
Should I get a heat pump instead of an AC and furnace?
In mild to moderate climates, a heat pump can handle both heating and cooling. In cold climates, many homes pair a heat pump with a gas furnace for backup (a dual-fuel system).