Furnace Replacement Cost in Southern California
Gas furnace replacement, standard vertical or horizontal application, existing venting.
Good / Better / Best
Good
$7,800 – $11,900
Goodman GM9S 80% AFUE single-stage
10 yr parts / lifetime heat exchanger (limited)
- • Cheapest entry
- • Simple to service
- • Works with existing venting
Plan 942 · ~$123/mo (115 mo)
Better
$10,500 – $16,200
Carrier 59SC5 96% AFUE two-stage
10 yr parts + 20 yr heat exchanger
- • 16% lower gas use
- • Quieter
- • Best value for cold desert climates
Plan 970 · ~$266/mo (58 mo)
Best
$14,000 – $21,600
Bryant Evolution 98% AFUE variable-speed
10 yr parts + lifetime heat exchanger
- • Modulating burner
- • Whisper-quiet ECM blower
- • Wi-Fi thermostat included
Plan 970 · ~$354/mo (58 mo)
What affects the price
- • 80% → 96% AFUE requires PVC venting (adds $600 – $1,200)
- • Condensate drain routing
- • Existing ductwork condition
- • Gas line resize (rare)
Financing options
| Plan | APR | Term | Monthly on $10k |
|---|---|---|---|
| Synchrony Plan 925 | 0% APR | 24 months | $417/mo |
| Synchrony Plan 970 | 5.99% APR | 58 months | $199/mo |
| Synchrony Plan 942 | 7.99% APR | 115 months | $125/mo |
Financing subject to Synchrony credit approval. See financing for full terms.
Frequently asked questions
Do I really need 96% AFUE in Southern California?
The upgrade pays back over ~9 years in the Antelope Valley. In coastal areas that never freeze, 80% AFUE is usually the right value.
How long does a furnace install take?
5–7 hours for a straight swap. If we're changing from 80% to 96% we add venting work — typically 1 full day.
Should I consider a heat pump instead?
Yes — see our /compare/heat-pump-vs-gas-furnace guide for the full economics.
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