HVAC replacement typically costs $5,000-$12,500 for a complete central system, with high-efficiency or complex installations reaching $18,000 or more. The final price depends most on system size, equipment efficiency, ductwork condition, labor rates, and whether the furnace, air conditioner, or both are being replaced.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Central AC replacement | $3,500 | $6,500 | $12,000 | Typical 2-4 ton system |
| Furnace replacement | $2,500 | $4,500 | $8,000 | Gas furnace, standard installation |
| AC and furnace replacement | $5,000 | $9,000 | $18,000 | Matched central system |
| Ductless mini-split | $2,000 | $5,500 | $12,000 | One to four indoor units |
What a Typical Central HVAC Replacement Costs
A standard central air conditioner and gas furnace replacement often totals $6,500-$12,500, averaging about $9,000. That range generally assumes a 2,000-square-foot home, a 2.5- to 3.5-ton air conditioner, a 60,000- to 100,000-BTU furnace, existing usable ducts, and ordinary access. A basic equipment-only changeout can be less, while new ductwork or major electrical work can raise the estimate.
Replacing only an air conditioner commonly runs $3,500-$12,000, while a furnace alone is often $2,500-$8,000. Prices vary by region and equipment tier; coastal metro markets frequently land above the national middle. Assumptions: standard-efficiency equipment, existing ductwork in serviceable condition, no major code upgrades. For a typical home with both units replaced, budgeting around $8,000-$12,000 is a practical starting point.
How Equipment, Labor, and Ductwork Shape the Quote
Contractors may quote equipment and labor together, so homeowners should ask which items are included. The ranges below describe common portions of a combined central AC and furnace job; the figures vary with equipment selection and local pricing.
| Quote item | Typical range | Pricing basis | What changes it |
|---|---|---|---|
| AC and furnace equipment | $3,500-$8,500 | Per matched system | Capacity, brand, efficiency |
| Installation labor | $1,500-$3,500 | $75-$150 per hour | Crew size, access, job hours |
| Duct repairs or modifications | $300-$3,000 | $10-$25 per linear ft | Leakage, insulation, layout |
| Permit and inspection | $100-$500 | Per project | City and county requirements |
| Removal and disposal | $100-$500 | Per old system | Haul-away and refrigerant handling |
Extra charges may cover a new thermostat, condensate drain, refrigerant line set, electrical disconnect, or flue changes. Some are necessary for safe installation or code compliance; others are optional upgrades. A written, itemized quote makes it easier to compare the full installed price rather than equipment alone.
Why Tonnage, SEER2, and Duct Condition Change Prices
System capacity should be based on a load calculation, not simply the size of the old unit. Many homes use 2-5 tons of cooling, but insulation, windows, ceiling height, and climate can shift the requirement. A difference of one ton may add roughly $500-$1,500 to equipment and installation, and an oversized unit can cycle inefficiently.
Efficiency also affects the quote. A standard central AC may be rated around 13.4-15.2 SEER2, while higher-efficiency models can exceed 16 SEER2; the upgrade can add about $1,000-$3,000, depending on capacity and features. If more than 20% of the duct system is damaged or undersized, repairs or replacement may add $1,500-$5,000 or more. Ask for the proposed tonnage, SEER2 rating, and duct findings in writing.
How Midwest and Coastal Labor Markets Compare
Regional differences can move an installed quote by 10%-25% compared with a typical national-market estimate. Large coastal cities and areas with high contractor demand may run 15%-25% higher, while some rural markets may come in 5%-15% lower; limited contractor availability or long travel distances can erase that discount.
Climate and local codes matter alongside labor. Hot southern markets often need more cooling capacity, while northern homes may have more complex heating equipment or venting requirements. Compare estimates from licensed local contractors using the same system size and equipment tier, not just the same brand name.
How Many Hours Does HVAC Replacement Take
A straightforward furnace-and-AC changeout usually takes a two- or three-person crew about 8-16 hours, often completed in one day. A furnace-only or AC-only replacement may take 4-8 hours when connections and access are uncomplicated. Duct changes, electrical upgrades, a difficult attic or crawl space, or crane access can extend work to two or more days.
Labor charges vary by market, but a common estimate is $75-$150 per technician-hour, with a crew’s total labor cost often bundled into the installed price. A same-day emergency replacement may carry an additional $300-$1,500, depending on timing and equipment availability. Ask whether the labor estimate includes startup testing, permits, cleanup, and removal of the old equipment.
When Repairing the Old System Costs Less
A repair can be economical when the system is under 10 years old and the problem is limited, such as a capacitor, contactor, or minor drain issue. Common service calls cost about $150-$600; major compressor or heat-exchanger work can reach $1,500-$4,000. Replacement becomes more compelling when repairs are frequent, parts are unavailable, or a single repair approaches 30%-50% of replacement cost.
Replacing only one half of a matched system may save money initially, but mismatched equipment can limit performance and complicate warranty coverage. Have the contractor check compatibility and compare the repair total with the cost of a complete matched system.
Ways to Lower an HVAC Replacement Estimate
Request at least three itemized quotes with the same capacity, efficiency level, thermostat scope, and warranty terms. Schedule during a contractor’s slower period, often spring or fall, if the old equipment can safely last; urgent summer or winter work may limit equipment choices and scheduling options.
Keep usable ductwork and controls when inspection shows they are properly sized and in good condition. Avoid paying for a higher SEER2 rating, zoning, or smart controls without estimating the likely energy savings for the home. Check local utility programs for eligible equipment incentives, but confirm availability and requirements before signing. Scope control and comparable bids usually provide more reliable savings than choosing a system by sticker price alone.
Which Add-On Charges Need a Closer Look
Common additions include duct sealing at $300-$1,500, a new thermostat at $150-$600 installed, and electrical or venting upgrades at $300-$2,000. Refrigerant line replacement can add $400-$1,500, especially when the existing line is damaged or incompatible. These are not automatic requirements; the contractor should explain the condition or code issue prompting each charge.
Permits commonly cost $100-$500, though local fees can be higher. Ask whether permit handling, inspection, disposal, and refrigerant recovery are included in the quote. Approve add-ons only after the estimate identifies the work, price, and reason it is needed.