HVAC installation costs typically range from $3,000 to $15,000 or more for a complete system, depending on system type, home size, efficiency tier, ductwork requirements, and regional labor rates. A standard central AC and furnace split system for a 1,500–2,000 sq ft home averages $5,000–$10,000 fully installed. Mini-split systems start lower per zone at $1,200–$3,500 per indoor unit installed, while geothermal systems can exceed $20,000 due to ground loop installation.

HVAC replacement typically costs $3,000–$12,000 for most residential systems, depending on system type, size, and efficiency. Replacement is generally less expensive than new installation because existing ductwork can often be reused. The cost includes removal and disposal of the old unit ($200–$700), new equipment, and labor. Replacing only the outdoor AC unit averages $2,000–$6,000, while replacing a full split system with air handler averages $4,000–$10,000.

New HVAC installation is for spaces with no existing system and requires running new ductwork, which adds $3,000–$12,000 to the total cost. Replacement swaps out an existing system and can reuse existing ductwork, making it less expensive on average. Replacement also includes removal and disposal of the old unit. The calculator handles both scenarios with a toggle, adjusting ductwork assumptions and removal costs accordingly.

An air source heat pump typically costs $2,800–$9,500 fully installed, including equipment and labor. The wide range reflects home size, efficiency tier, and regional labor rates. High-efficiency heat pumps (17+ SEER) cost more upfront but qualify for federal tax credits under the Inflation Reduction Act, which can offset $300–$2,000 of the cost. Geothermal heat pumps cost significantly more — typically $10,000–$30,000 — due to the ground loop excavation required.

A single-zone ductless mini-split system typically costs $1,200–$6,500 installed, including equipment and labor. Multi-zone systems scale by the number of indoor heads — each additional zone adds approximately $700–$2,500 in equipment and $500–$2,000 in labor. Mini-splits do not require ductwork, which makes them cost-effective for additions, garages, older homes, or rooms that are difficult to serve with central duct systems.

HVAC ductwork costs vary widely depending on scope. Minor duct sealing and repairs typically cost $300–$1,500. Partial ductwork replacement averages $1,500–$6,000. A full new ductwork installation for a typical home costs $3,000–$12,000, depending on home size, layout, and accessibility. Reusing existing ducts in good condition adds no cost. Leaky or damaged ducts that are not addressed can waste 20–30% of conditioned air and significantly increase energy bills.

SEER (Seasonal Energy Efficiency Ratio) measures cooling efficiency — higher SEER means lower operating costs. Standard 14–16 SEER systems meet current minimum requirements and are the most affordable upfront. High-efficiency 17–20 SEER systems cost 20–30% more but reduce cooling energy use by 15–25%. Premium 21+ SEER systems have the highest upfront cost but the lowest operating cost. The payback period for upgrading from standard to high efficiency is typically 5–10 years depending on your climate and electricity rates.

HVAC labor rates vary significantly across the US due to differences in cost of living, licensing requirements, union density, and local market competition. Pacific states like California and Washington have the highest labor rates — typically 25–35% above the national average. Northeast states follow closely. Southeast and South Central states like Texas, Georgia, and Louisiana tend to have labor rates 8–12% below the national average. The calculator applies regional multipliers to labor costs to reflect these differences.

Replacing both at the same time is generally recommended if both units are more than 10–12 years old or if one has already failed. The labor cost for replacing both simultaneously is lower than doing two separate jobs, and matching equipment from the same manufacturer ensures proper system compatibility and efficiency. Mismatched equipment — such as a new high-efficiency AC paired with an old air handler — can reduce efficiency and void warranties.

Yes. The federal Inflation Reduction Act provides tax credits for qualifying high-efficiency heat pumps and heat pump water heaters — up to 30% of the cost, capped at $2,000 per year. Many utilities also offer rebates for upgrading to high-SEER systems or replacing gas equipment with electric heat pumps. Rebates and credit amounts vary by equipment type, efficiency rating, and location. Check with your utility provider and the ENERGY STAR website for current incentives in your area.

Yes, the HVAC Cost Calculator is completely free to use. You can estimate installation or replacement costs for any system type, see a full itemized cost breakdown, and adjust for home size, efficiency, ductwork, and region without creating an account or signing up.