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Modern HVAC condenser unit installed beside a residential home

HVAC Replacement Cost Calculator

Compare central AC, heat pump, ductless mini-split, and gas furnace replacement costs by home size and state. Instant estimate, no sign-up.

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1. Your Home

Home Size

Home Square Footage

System Type

Estimated capacity: 3.0 tons

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2. Your Location

State

Remove Existing System?

System Cost Overrides ($ total installed, 3-ton baseline)

Central AC ($)

Central HVAC ($)

Heat Pump ($)

Mini-Split ($)

Disposal ($)

Prices are national averages adjusted by state-level labor cost multipliers and system size. For exact quotes, get estimates from licensed HVAC contractors. Use Advanced Settings to enter your actual contractor quotes.

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HVAC System Reference

Central air conditioner condenser unit outside home

Central AC

$3,200–$5,800 · 15 yr lifespan

Gas furnace and AC unit in a basement utility room

Central HVAC

$5,000–$9,500 · 15 yr lifespan

Heat Pump

$4,500–$9,000 · 15 yr lifespan

Ductless Mini-Split

$3,800–$8,000 · 20 yr lifespan

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3. Your HVAC Cost Comparison

System	Unit Size	Equipment	Labor	Disposal	Total	Lifespan	Cost/Year
Select a state above to see your cost comparison.

Estimates based on national averages adjusted for your state and home size. Actual costs depend on existing ductwork condition, electrical panel capacity, refrigerant type, permit fees, and contractor pricing. This is a planning tool, not a binding quote. Get at least 3 quotes from licensed HVAC contractors.

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How This Calculator Works

This calculator estimates the total installed cost of four common HVAC system types based on your home's square footage, system type, and state.

Tons calculation uses the industry standard rule of thumb: 1 ton of cooling capacity per 600 sq ft of conditioned space. A 2,000 sq ft home needs roughly 3.0 tons. The calculator clamps capacity to a realistic 1.5–5.0 ton range. Proper sizing in practice requires a Manual J load calculation from your contractor.

Size multiplier scales costs from the 3-ton baseline. A 2-ton system costs roughly two-thirds as much as a 3-ton system; a 4-ton system costs about one-third more. Equipment and labor both scale with tonnage.

Regional multipliers reflect that HVAC labor and equipment delivery costs vary significantly by location. States are grouped into four tiers: Low cost (rural South/Midwest, 0.85×), Average (most states, 1.0×), High (Northeast/West Coast, 1.15×), and Very High (NYC metro, SF Bay Area, Hawaii, Alaska, 1.30×).

Disposal is a flat fee for removing and disposing of your existing system (compressor, air handler, and/or furnace). This adds $200–$500 adjusted for regional labor costs.

Cost per year divides the total installation cost by the expected system lifespan. Mini-splits have a longer lifespan (20 years) than central systems (15 years), which affects their long-term cost competitiveness. The "BEST VALUE" tag highlights the system with the lowest annual cost.

Lowest Cost System

Select a state — Total installed cost for your home

Equipment —

Labor —

Cost per year —

Lifespan —

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No email, phone number, or sign-up required. State-level pricing adjustments use Bureau of Labor Statistics regional cost data.

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HVAC Cost Guides

In-depth articles on systems, costs, and decisions.

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Frequently Asked Questions

Answers to common HVAC replacement cost questions.

How much does it cost to replace an HVAC system?

Replacing a central HVAC system (air conditioner plus gas furnace) costs $5,000–$9,500 for a typical 2,000 sq ft home. Central AC only runs $3,200–$5,800, a heat pump costs $4,500–$9,000, and a ductless mini-split (2-zone) runs $3,800–$8,000. Costs scale with system size (measured in tons) and vary 15–30% by region. Large homes and high-efficiency systems push toward the top of each range.

When should I replace my HVAC system?

Replace your HVAC system when it is 15–20 years old, requires frequent repairs costing more than 50% of a new system, or has a SEER rating below 13 (current minimum is 14–15 depending on region). Other signals: uneven heating or cooling, rising energy bills, excessive noise, or R-22 refrigerant (discontinued in 2020 and now very expensive to recharge). The "5,000 rule" helps: multiply the repair cost by the unit's age in years; if the result exceeds $5,000, replace rather than repair.

Heat pump vs central AC: which is better?

A heat pump handles both heating and cooling in one system, making it the better choice in moderate climates (most of the US South, Mid-Atlantic, Pacific Northwest). In climates where winter temperatures regularly drop below 20°F, a gas furnace paired with central AC is often more cost-effective because heat pumps lose efficiency in extreme cold. Heat pumps also qualify for the federal 30% tax credit (up to $2,000) under the Inflation Reduction Act. If you have natural gas service and live in a cold climate, central HVAC (AC + furnace) typically offers the lowest operating cost.

How long does an HVAC system last?

Central air conditioners and gas furnaces typically last 15–20 years with regular maintenance (annual tune-ups, filter changes every 1–3 months). Heat pumps last a similar 15–20 years. Ductless mini-splits generally last 20–25 years because they run at variable speeds rather than cycling on and off. Keeping the outdoor condenser unit clear of debris, scheduling annual professional tune-ups, and replacing air filters regularly can add years to any system's life.

What size HVAC system do I need?

HVAC capacity is measured in tons of cooling (1 ton = 12,000 BTU/hr). A common rule of thumb is 1 ton per 600 sq ft, so a 1,500 sq ft home needs roughly 2.5 tons and a 2,400 sq ft home needs 4 tons. However, proper sizing requires a Manual J load calculation that accounts for your climate zone, insulation levels, window area, ceiling height, and local design temperatures. An oversized system short-cycles (leading to humidity problems and premature wear); an undersized system runs constantly and can't meet peak demand. Always ask your contractor for a Manual J calculation.

What are the pros and cons of ductless mini-splits?

Ductless mini-splits are ideal for homes without existing ductwork, additions, garages, or rooms with comfort problems. Pros: no duct losses (ducts can waste 20–30% of energy), individual zone control, quieter operation, and longer lifespan than central systems. Cons: higher upfront cost per zone than central HVAC, wall units are visible in the room, and multi-zone installs can get expensive ($1,500–$2,500 per additional zone beyond the base 2-zone system). They also qualify for federal tax credits. For a whole-house system in a home without ducts, mini-splits are typically the most cost-effective option.