Installing a gas furnace with matched central air commonly costs homeowners between $5,000 and $12,000 depending on equipment size, efficiency, ductwork condition, and labor. This article lists low-average-high price ranges and the main cost drivers so buyers can compare quotes for a gas furnace with central air.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Complete Furnace + Central AC Install | $4,200 | $8,500 | $15,000 | Assumptions: 2-3 ton AC, 60k–80k BTU furnace, existing ductwork in fair condition, suburban U.S. |
| Furnace Only (mid-efficiency) | $2,000 | $3,800 | $6,000 | Assumptions: 60k–80k BTU, standard AFUE 80–95%. |
| AC Only (central) | $2,000 | $4,700 | $9,000 | Assumptions: 2–4 ton, SEER 13–16. |
Typical Total Price for a Whole-House Gas Furnace With Central AC
Homeowners typically pay $5,000-$12,000 for a matched gas furnace and central air installation in a 1,500–2,500 sq ft house. Lower end assumes entry-level equipment and minimal duct work; average assumes mid-efficiency 80–95% AFUE furnace and 13–16 SEER AC with modest duct repairs; high end assumes high-efficiency furnace (95%+), 18–20 SEER AC, new duct system, and premium labor in an urban market.
Assumptions: single-family home, normal attic/basement access, no major code upgrades.
Cost Breakdown: Materials, Labor, Equipment, and Permits
A typical quote separates costs into equipment, materials, labor, permits, and disposal; equipment is usually the largest line item.
| Materials | Labor | Equipment | Permits | Delivery/Disposal |
|---|---|---|---|---|
| $500-$2,000 | $800-$3,500 | $2,000-$7,500 | $50-$400 | $100-$600 |
| Includes ducts, registers, refrigerant piping. | Typical rates $75-$125 per hour. | Furnace + AC packaged or split systems. | Local building/inspection fees. | Old unit removal, EPA fees for refrigerant. |
How Furnace Size (BTU), AC Tonnage, and Efficiency Change Price
Selecting furnace BTU and AC tonnage directly alters equipment cost and installation complexity. Example thresholds: furnaces 40k–60k BTU are common for small homes and cost about $2,000-$3,200 installed; 60k–80k BTU units for medium homes cost $3,000-$5,000; 80k+ BTU for large homes cost $4,500-$7,000. For AC, 1.5–2.5 ton units cost $2,000-$4,000 installed, 3–4 ton units $3,500-$6,000, and 5+ ton specialty systems can exceed $8,000.
Practical Ways To Cut the Price When Installing Both Furnace and Central Air
Coordinating replacement (furnace and AC together), keeping usable ductwork, and choosing mid-efficiency models reduce cost significantly. Specific tactics: replace both units at once to avoid duplicate labor ($400-$1,200 saved), opt for matched mid-SEER/AFUE equipment instead of top-tier ($1,500-$4,000 saved), and schedule work in shoulder seasons (spring/fall) to avoid peak pricing (5–15% lower).
How Regional Market Differences Affect Final Quotes
Prices vary by region: expect 10–25% higher labor and permitting costs in coastal urban markets versus Midwest or rural areas. Example deltas: Northeast/West Coast +10% to +25%; Midwest/South baseline; Mountain states +5% to +15% depending on access. Material markups and code requirements (seismic strapping, specific venting) change totals.
Typical Installation Time, Crew Size, and Hourly Rates
Most full furnace+AC installs take 8–20 hours and require a 2-3 person crew; labor hours are a direct cost driver. Typical labor breakdown: 2 technicians × 8–12 hours for straightforward swap; complex jobs with duct replacement may be 16–40 hours. Expect contractor hourly rates of $75-$125 and service minimums of $400-$800.
Common Add-Ons, Disposal Fees, and Unexpected Charges
Common extras that raise the quote include duct sealing/replacement, electrical upgrades, refrigerant recharge, and condensate pump installation. Typical extra costs: duct sealing $300-$1,200; major duct replacement $1,500-$5,000; electrical circuit or subpanel upgrade $400-$1,200; refrigerant recovery or recharge $100-$600; condensate pump $150-$450. Always ask for line-item pricing on these extras.
Sample Real-World Quotes To Compare
Concrete examples help translate ranges into real bids for planning.
| Scenario | Specs | Labor Hours | Total Price |
|---|---|---|---|
| Budget Swap | 60k BTU furnace, 2.5 ton AC, reuse ducts | 10 hours | $4,200-$5,300 |
| Average Replacement | 80k BTU furnace, 3 ton AC, minor duct repair | 16 hours | $7,500-$9,200 |
| High-End Remodel | 95% AFUE furnace, 18 SEER AC, full duct replacement | 30+ hours | $12,000-$18,000 |