The cost of a new furnace and central air conditioner depends on multiple factors, from the type and efficiency of the units to ductwork needs and installation labor. This guide outlines typical installed price ranges in the United States, what drives price differences, and practical tips to budget and save without sacrificing comfort or reliability.
Understanding The Price Range
Prices for a new furnace and central air conditioner vary widely. In general, homeowners can expect installed costs to fall between about $6,000 and $12,000 for a complete, running system. Basic setups with standard efficiency may sit toward the lower end, while premium, high-efficiency models with complex ductwork push costs higher. The exact price depends on the home’s size, climate, and existing equipment.
| Item | Typical Installed Cost (USD) |
|---|---|
| Furnace (gas), standard efficiency | $2,500 – $5,000 |
| Furnace (gas), high efficiency/condensing | $4,000 – $7,500 |
| Central air conditioner, 14-16 SEER | $3,000 – $7,000 |
| Combo (furnace + AC), standard to mid-range | $6,500 – $12,000 |
Note: Costs can rise with larger homes, unusual duct layouts, or the need for extensive electrical work, gas line upgrades, or long refrigerant lines. Seasonal sales or utility rebates can also influence your final number.
Factors That Influence Cost
- Unit type and efficiency: Gas furnaces with higher AFUE ratings (90%+), or two-stage and variable-speed operation, cost more upfront but save on energy bills over time.
- Central air conditioner efficiency: Higher SEER ratings (18-21) raise price but improve cooling efficiency and comfort, especially in hot regions.
- Ductwork and installation complexity: Homes with damaged, undersized, or poorly routed ducts require more labor and materials, increasing total cost.
- Labor and permitting: Local labor rates and required permits affect final quotes. New installation may need electrical upgrades or gas line adjustments.
- Existing equipment compatibility: If the current furnace and AC are a matched system, installation is often simpler and cheaper than pairing mismatched brands or legacy components.
- Additional components: Thermostats, zoning systems, air purifiers, and advanced controls add to the price but may enhance comfort and indoor air quality.
- Climate and service availability: In regions with extreme summers or winters, demand and access to skilled installers can influence pricing.
Typical Costs For Common Setups
Gas Furnace Only (Installed)
A standard-efficiency gas furnace installed, without a new air conditioner, typically ranges from about $2,800 to $6,500. A high-efficiency condensing furnace may run between $4,000 and $7,500, depending on features and warranties. Labor, old equipment removal, and potential ductwork adjustments are included in the price.
Central Air Conditioner Only (Installed)
Installing a central air conditioner by itself usually falls in the $3,000 to $7,000 range. For higher efficiency models or larger homes, costs can exceed $7,000. Expect longer payback if existing ducts require resealing or replacement.
Furnace + Air Conditioner (Complete System) Installed
A full replacement of both components typically costs between $6,500 and $12,000. In premium scenarios with top-tier SEER and AFUE, or when ductwork must be rebuilt, total costs can rise beyond $12,000. Bundling both units with coordinated wiring, controls, and ventilation improvements often yields better performance and warranty coverage.
What Affects Installation Price
- System size and load calculation: Accurate sizing, based on a Manual J load calculation, ensures efficiency but may add upfront time and cost.
- Equipment brands and features: Trusted brands and features like two-stage operation, variable-speed blowers, or smart thermostats influence price.
- Duct design and condition: Uneven airflow, leaky ducts, or the need for new or enlarged ducts increases labor and material costs.
- Warranties and service plans: Extending warranties or adding maintenance plans raises upfront costs but can reduce long-term risk.
- Financing and incentives: Availability of rebates, tax credits, or promotional financing can lower effective cost.
- Installation timing: Scheduling during peak demand can affect price; shoulder seasons may offer better quotes.
Financing And Warranties
- Warranties: Typical parts warranties range from 5 to 10 years. Labor coverage varies by contractor and plan, so read the fine print.
- Extended coverage: Manufacturer or third-party extended warranties are available, often at additional cost, and may cover major components beyond the standard term.
- Financing options: Many installers offer 0% or low-interest financing for qualified buyers, with terms lasting 12 to 60 months. Always compare total costs and any deferred interest rules.
- rebates and incentives: Federal, state, and utility rebates may reduce the price. Local programs can vary widely by region and year.
Tips To Save On Replacement Costs
Obtain at least three written estimates to compare equipment, warranties, and inclusions. Ask for a fixed price that covers removal, installation, and disposal. Ensure a proper load calculation to avoid oversizing, which wastes energy and increases upfront cost. Consider replacing both units together to qualify for discounts and a single comprehensive warranty. If ducts are in good shape, you may avoid costly repairs. If not, factor duct improvements into the total. Check federal energy tax credits, state incentives, and utility rebates. These can significantly reduce the net price. Enroll in a maintenance program to maximize efficiency and extend equipment life, potentially lowering long-term costs.
Maintenance And Efficiency Savings
Annual servicing of both furnace and AC reduces breakdowns and keeps efficiency high, often paying for itself over time. Smart or programmable thermostats optimize energy use, lowering monthly bills, especially in extreme weather. High-efficiency filters and purifiers improve indoor air and may reduce strain on the system by improving airflow. Proper insulation minimizes heat loss and gain, enhancing system performance and saving energy.