How much does a new HVAC system cost?

A new central HVAC system (furnace + AC) costs $5,000-$15,000 installed in 2026. A furnace alone runs $2,500-$7,000, and central air conditioning $3,000-$8,000. High-efficiency systems and heat pumps cost more upfront but reduce energy bills by 20-40%.

What size HVAC system do I need?

HVAC sizing is based on BTU requirements: roughly 20-25 BTU per square foot of living space, adjusted for climate zone, insulation, windows, and ceiling height. A 2,000 sq ft home typically needs a 3-4 ton AC unit (36,000-48,000 BTU). Our calculator provides precise sizing.

How often should I replace my HVAC system?

Furnaces last 15-20 years and air conditioners 12-15 years with proper maintenance. If repair costs exceed 50% of replacement cost, or your system uses R-22 refrigerant (phased out), replacement is recommended. New systems are 30-50% more efficient than units from 15 years ago.

HVAC System Cost Calculator

Calculate HVAC installation costs by system type, SEER rating, and home size. Equipment + labor with regional pricing. Free, no signup.

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Licensed Contractor Required

HVAC installation requires licensed professionals for refrigerant handling, electrical work, and code compliance. Most areas require permits and inspections.

For Homeowners: Get a quick cost range with just a few measurements. Perfect for budgeting and comparing contractor quotes.

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Efficiency Level

Ductwork Condition

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Assumptions & Sources

Assumptions

System sizing: The two modes size differently. Quick mode reads tonnage off a home-size tier table rather than dividing by a fixed figure — the tiers it offers imply 533 to 786 sqft per ton, and the climate zone then adjusts that tonnage again. Professional mode divides your exact square footage by 500, or uses the tonnage you enter and ignores climate. Neither is a substitute for a professional Manual J calculation, which is what should actually size the equipment.
SEER ratings: 14 SEER minimum as of Jan 2023 for most US regions. Higher efficiency = higher cost but lower operating costs.
Labor rates: Based on 2025-2026 national averages for licensed HVAC technicians.
Ductwork: Costs vary significantly based on home layout, access, and materials.
Permits: Required in most jurisdictions for HVAC work. Verify local requirements.

Data Sources

U.S. Bureau of Labor Statistics (BLS) Wage Data
ACCA Manual J Load Calculation Standards
ENERGY STAR Equipment Specifications
AHRI (Air-Conditioning, Heating, and Refrigeration Institute)
HomeAdvisor True Cost Guide 2024-2025

Last updated: August 2026

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HVAC System Calculator by State