A new HVAC system typically costs $5,000 to $12,500 installed for a standard central air conditioning and heating system (AC + furnace) in a single-family home.
The total cost depends on the system type (central AC, heat pump, mini-split), home size, efficiency rating, brand, ductwork condition, and geographic location.
Heat pump systems, which handle both heating and cooling, typically cost $8,000 to $15,000 installed but may qualify for federal tax credits under the Inflation Reduction Act's Energy Efficient Home Improvement Credit.
Homeowners planning a full interior renovation may also want to compare the furnace replacement cost separately, as replacing components individually is sometimes more cost-effective.
HVAC System Cost Breakdown
A central air conditioning unit alone (AC only) typically costs $3,500 to $7,500 installed, including the condenser, coil, refrigerant, and labor.
A gas furnace alone costs $2,500 to $5,500 installed — see the furnace replacement cost guide for a full breakdown of furnace-only pricing.
Replacing both together (AC + furnace bundle) typically saves money on combined installation labor.
Heat pump systems (heating and cooling combined) cost $5,000 to $12,000 for standard units, with high-efficiency cold-climate heat pumps running $10,000 to $20,000 installed. The HVAC technician salary data helps explain why labor rates vary significantly by market.
Factors That Affect Cost
Home size is the primary cost driver — larger homes require higher-capacity equipment. SEER2 (Seasonal Energy Efficiency Ratio) rating affects price: higher-efficiency units cost more upfront but lower operating costs. Ductwork condition and accessibility affect installation labor cost.
Geographic location affects both equipment pricing and labor rates. Brand reputation and warranty terms also affect cost. Homeowners in states with high energy costs — such as those researching cost of living in California — may see faster payback periods on high-efficiency systems.
Federal Tax Credits for HVAC in 2026
The Inflation Reduction Act (IRA) provides a 30% federal tax credit on eligible heat pumps, heat pump water heaters, and high-efficiency HVAC equipment under the Energy Efficient Home Improvement Credit (Section 25C).
The annual credit cap for heat pumps is $2,000.
Eligible equipment must meet specified efficiency thresholds.
Check current IRS Form 5695 instructions for qualifying equipment standards. For a broader look at which home upgrades qualify for deductions, the home improvements that may be tax deductible guide explains what qualifies and what does not.
Signs You Need a New HVAC System
HVAC systems typically last 15 to 20 years for central AC and 20 to 30 years for furnaces.
Signs it may be time to replace rather than repair: the unit is more than 15 years old, repair costs exceed 50% of replacement cost, energy bills have increased significantly, the system runs constantly without maintaining temperature, or it uses R-22 refrigerant (phased out and now expensive).
Homeowners who also need other major work done at the same time — such as a kitchen remodel cost or bathroom remodel cost — should budget HVAC replacement as part of a broader renovation plan to consolidate contractor visits.
Frequently Asked Questions
How much does a new HVAC system cost in 2026?
A new central AC and furnace system typically costs $5,000 to $12,500 installed. Heat pump systems range from $8,000 to $20,000 for high-efficiency cold-climate models. Replacing only the furnace costs $2,500 to $5,500 — see the furnace replacement cost guide for details.
Is there a tax credit for a new HVAC system?
Yes. The IRA's Energy Efficient Home Improvement Credit (Section 25C) provides a 30% tax credit up to $2,000 on qualifying heat pumps. Verify current IRS Form 5695 for eligible equipment and thresholds.
The home improvements that may be tax deductible guide covers which HVAC-related upgrades may qualify.
How long does an HVAC system last?
Central AC systems typically last 15 to 20 years. Gas furnaces typically last 20 to 30 years. Regular maintenance extends system life.
Should I repair or replace my HVAC system?
A common rule is: if repair cost exceeds 50% of replacement cost or the unit is over 15 years old, replacement is typically more cost-effective in the long run.
If a full roof replacement is also needed, bundling larger home projects can sometimes reduce overall contractor costs — see the new roof cost guide for reference.
What size HVAC system do I need?
HVAC capacity is measured in tons or BTUs. Sizing requires a Manual J load calculation based on square footage, insulation, climate, and home characteristics. An improperly sized system reduces efficiency and lifespan.
Homeowners with large homes who are evaluating overall home affordability thresholds should factor ongoing HVAC operating costs into their long-term budget.
Sources & References
- U.S. Department of Energy — Heating and Cooling Efficiency — https://www.energy.gov/energysaver/heat-pump-systems
- IRS Form 5695 — Residential Energy Credits — https://www.irs.gov/forms-pubs/about-form-5695
- EPA — ENERGY STAR HVAC — https://www.energystar.gov/products/heating_cooling
Last updated: April 27, 2026