Upgrading to a gas furnace and central air conditioner is a major home investment in the United States. Understanding the average cost helps homeowners budget for equipment, installation, and potential energy savings. This guide breaks down typical installed prices, identifies major cost drivers such as efficiency ratings and ductwork, and explains how regional differences influence total investment. It also offers steps to prepare for quotes and maximize value through smart choices and incentives.
What Averages Look Like For Gas Furnaces And Air Conditioners In The U.S.
In the U.S., the installed cost for a new gas furnace typically ranges from $3,000 to $6,500 for mid-range models, and $4,000 to $7,500 for high-efficiency condensing units. Central air conditioners installed alongside a furnace generally fall between $3,800 and $7,800 for standard efficiency, with premium SEER 18–20 units ranging higher, from roughly $7,500 to $14,000. Bundling both components often yields a combined installed price in the $7,500 to $12,000 range, depending on size and ductwork needs.
Understanding Cost Components
The total installed price includes equipment, labor, and optional additions. Equipment cost accounts for the furnace and AC unit and their efficiency. Labor covers removal of old equipment, installation, and testing. Ductwork replacement or modifications, venting for gas furnaces, and new refrigerant lines add to the bill. Permits, inspections, and potential system checks by the utility or city can add hundreds of dollars. Finally, thermostats, air purifiers, humidifiers, and zoning controls are optional upgrades that increase upfront costs but may boost comfort and efficiency.
Gas Furnace Costs
Equipment Cost
Furnace prices vary by AFUE (fuel efficiency) and stage technology. Standard-efficiency furnaces (80%–89% AFUE) are typically less expensive, while high-efficiency condensing models (90%–97% AFUE) cost more upfront but save energy over time. Expect equipment-only prices approximately $1,000 to $3,000 for basic units and $2,500 to $4,500 for mid-range. Premium two-stage or modulating furnaces can push equipment costs higher.
Installed Cost
Installed costs include labor, venting, and any ductwork adjustments. Typical installed ranges are:
- 80% AFUE standard unit: $3,000–$4,500 installed
- 90%–97% AFUE high-efficiency: $4,500–$7,000 installed
More complex setups, larger homes, or extensive venting can increase costs beyond these ranges.
Central Air Conditioning Costs
Equipment Cost
Central air conditioner equipment cost depends on coil, condenser unit, and SEER. A basic SEER 14–16 system is typically $1,000–$3,000 for the unit itself; higher-efficiency SEER 18–21 units can reach $3,000–$5,000 or more.
Installed Cost
Installed central AC prices often range from $3,800 to $7,800 for standard efficiencies, while premium, high-SEER systems can range from $7,500 to $14,000, depending on capacity and ductwork needs.
Bundled Systems: Gas Furnace And Air Conditioner
Buying both components together can reduce labor time and cost, especially when ducts are in good condition. Typical bundled installed costs range from $7,500 to $12,000 for mid-range configurations. Premium, high-efficiency bundles with advanced air handlers and variable-speed compressors can reach $11,000 to $18,000 or more. Regional price differences and existing ductwork may shift these figures.
Efficiency And Features That Influence Cost
Efficiency upgrades increase upfront cost but lower ongoing energy usage. Key factors include:
- AFUE (Annual Fuel Utilization Efficiency) measures furnace efficiency. Higher AFUE usually costs more but saves energy.
- SEER (Seasonal Energy Efficiency Ratio) indicates air conditioner efficiency; higher SEER means more upfront cost but lower cooling bills.
- Two-stage and modulating furnaces deliver more consistent comfort but cost more than single-stage models.
- Variable-speed blower motors and smart thermostats improve comfort and efficiency but add upfront costs.
- Consider system compatibility and refrigerant lines, venting, and potential duct upgrades.
Regional Variations And Financing Options
Prices vary by region due to climate, labor markets, and permitting rules. The Midwest and Northeast tend to have higher installation costs for gas lines, venting, and ductwork than the South. Utility rebates and manufacturer promotions also vary by state and utility provider. Financing options, such as low-interest loans, home improvement credit, or HVAC rebates, can ease upfront costs. Some contractors offer seasonal promotions or bundled warranty plans that cover maintenance and repairs for several years.
Value, Payback, And Tips To Save
While upfront costs can be substantial, energy savings, improved comfort, and reliability offer long-term value. A well-sized, efficient furnace paired with a compatible AC can lower monthly utility bills by reducing heat loss and reducing cooling demand. Typical payback periods range from 4 to 10 years depending on energy prices, usage, and climate. To save, homeowners should compare multiple quotes, verify system size and commissioning, and prioritize reputable installers with solid warranties.
What To Ask An Installer
Use this checklist to get clear quotes and ensure proper installation.
- Is the system properly sized for your home? (Request a load calculation, Manual J)
- What AFUE and SEER are included in the quote?
- Are two-stage or modulating models available and recommended for your home?
- What ductwork modifications are required, and is a duct inspection included?
- What is included in the warranty for the furnace and AC?
- Are there any rebates or tax credits you can apply, and how is the paperwork handled?
- What maintenance plan is offered and what does it cover?