Most U.S. homeowners replacing an air conditioner and furnace together pay between $6,000 and $18,000 depending on size, efficiency, and ductwork. This article shows typical AC furnace replacement cost ranges, per-unit pricing, and the main drivers that change a contractor quote.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Full AC + Furnace System | $4,500 | $10,500 | $22,000 | Assumptions: Single-family home, 2–3 ton AC, 80k–100k BTU furnace, standard ducts. |
| AC Only (2–3 ton) | $2,800 | $5,500 | $9,500 | Includes condenser, coil, basic install. |
| Furnace Only (80k–100k BTU) | $1,600 | $4,200 | $8,000 | Mid-efficiency to high-efficiency units. |
| Duct Repair/Replacement | $800 | $3,500 | $12,000 | Depends on linear feet and access. |
Content Navigation
- Typical Replacement Price for a Combined AC and Furnace System
- What a Contractor Quote Breaks Down Into
- How Unit Size, Efficiency, and Duct Condition Change the Final Price
- Specific Site Conditions That Often Increase Quotes
- Practical Ways To Reduce AC and Furnace Replacement Price
- How Labor Time, Crew Size, and Scheduling Affect the Quote
- Three Real-World Quote Examples With Specs and Totals
Typical Replacement Price for a Combined AC and Furnace System
Expect a combined installation total most commonly in the $7,500-$13,000 range for average-sized homes. A standard quote covers a matched condensing unit (2–3 tons) plus a 80k–100k BTU furnace with basic thermostat and one-day install.
Assumptions: Suburban U.S., accessible attic/crawlspace, existing ductwork in fair condition.
What a Contractor Quote Breaks Down Into
The contractor estimate typically itemizes materials, labor, equipment rental, permits, delivery/disposal and warranty.
| Cost Element | Typical Low | Typical Average | Typical High |
|---|---|---|---|
| Materials (units, coils) | $2,200 | $4,800 | $11,000 |
| Labor (installation) | $900 | $2,400 | $5,000 |
| Equipment (lifts, vac pumps) | $75 | $250 | $800 |
| Permits & Inspections | $50 | $200 | $900 |
| Delivery/Disposal | $50 | $200 | $1,200 |
| Warranty / Start-up | $0 | $200 | $600 |
How Unit Size, Efficiency, and Duct Condition Change the Final Price
Unit tonnage, furnace BTU, and SEER/AFUE ratings are the biggest line-item drivers of price. Examples: 1.5–2 ton AC units: $2,800-$4,200; 3–4 ton: $5,000-$9,000. Furnaces: 60k–80k BTU: $1,600-$3,200; 100k–120k BTU high-efficiency: $3,800-$8,000.
Other thresholds: major duct replacement over 200 linear feet typically adds $3,000-$10,000; switching to variable-speed air handler adds $800-$2,500.
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Specific Site Conditions That Often Increase Quotes
Tough access, multi-story runs, and outdated refrigerant lines commonly add several hundred to several thousand dollars. Examples: tight attic access adds $300-$1,200; long refrigerant line sets over 50 ft add $250-$1,000; needing refrigerant retrofit from R22 can add $1,000-$6,000 for new compatible equipment and disposal.
Practical Ways To Reduce AC and Furnace Replacement Price
Control cost by keeping scope limited: prioritize matched system replacement, delay noncritical upgrades, and prepare the site before install. Specific tactics: do simple prep (clear attic access), accept mid-efficiency units instead of premium SEER/AFUE, and bundle with other home projects for contractor discounts.
Get at least three detailed written quotes, compare line-item pricing, and ask about trade-in credits for old units to reduce net expense.
How Labor Time, Crew Size, and Scheduling Affect the Quote
Typical installs take 6–12 hours for a two-tech crew; longer jobs increase labor and total cost proportionally. Small single-tech installs: 4–8 hours ($300-$900 labor); two-tech full replacement with duct adjustments: 10–20 hours ($750-$2,500 labor). Weekend or emergency scheduling often adds 10%–30% in rush fees.
Three Real-World Quote Examples With Specs and Totals
| Scenario | Specs | Labor Hours | Price |
|---|---|---|---|
| Budget Replace | 2-ton AC, 80k BTU furnace, basic coils, existing ducts | 8 hours | $4,500-$6,200 |
| Mid-Range Match | 3-ton AC (14 SEER), 100k BTU 95% AFUE furnace, new thermostat | 12 hours | $8,000-$12,500 |
| High-End Upgrade | 3.5-ton AC (18 SEER), modulating furnace 120k BTU, duct replacement 250 ft | 20+ hours | $16,000-$24,000 |
These examples reflect typical U.S. pricing variation by efficiency, size, and ductwork scope.
Tips for Getting the Best HVAC Prices
- Prioritize Quality Over Cost
The most critical factor in any HVAC project is the quality of the installation. Don’t compromise on contractor expertise just to save money. - Check for Rebates
Always research current rebates and incentives — they can significantly reduce your overall cost. - Compare Multiple Quotes
Request at least three estimates before making your choice. You can click here to get three free quotes from local professionals. These quotes include available rebates and tax credits and automatically exclude unqualified contractors. - Negotiate Smartly
Once you've chosen a contractor, use the proven strategies from our guide — How Homeowners Can Negotiate with HVAC Dealers — to get the best possible final price.