HVAC Installation Cost Calculator — By System Type & Home Size
Get an accurate estimate for installing a new AC, furnace, heat pump, or full HVAC system based on your home size and preferences.
How It Works
Select system type
Choose from central AC, heat pump, gas furnace, or a full HVAC system.
Enter home details
Provide square footage, number of stories, and ductwork condition.
Get your estimate
Receive a cost range covering equipment, labor, permits, and startup.
2026 HVAC Installation Cost Ranges
| System Type | Standard | High Efficiency |
|---|---|---|
| Central AC Only | $2,200 – $4,500 | $3,800 – $7,500 |
| Heat Pump | $2,700 – $5,300 | $4,700 – $9,500 |
| Gas Furnace | $1,500 – $3,000 | $2,500 – $5,500 |
| Full Central HVAC | $3,500 – $6,500 | $6,500 – $12,000 |
Frequently Asked Questions
How much does HVAC installation cost?
HVAC installation costs $3,500–$12,000 for a full central system. Central AC only runs $2,200–$7,500. A gas furnace costs $1,500–$5,500. A heat pump system costs $2,700–$9,500. High-efficiency systems cost 20–40% more upfront but can save $300–$1,000 per year in energy costs. Ductwork installation or replacement adds $2,000–$6,000 if needed.
What size HVAC system do I need?
HVAC sizing is calculated in tons (BTU capacity). Rule of thumb: 1 ton per 400–600 sq ft in a well-insulated home. A 1,800 sq ft home typically needs a 3-ton system. However, proper sizing requires a Manual J load calculation that accounts for climate, insulation, window area, and home orientation. An oversized system short-cycles and an undersized one can't keep up — both reduce efficiency and lifespan.
Heat pump vs. furnace and AC: which is better?
Heat pumps are more efficient than furnaces in mild to moderate climates (above 30°F) and qualify for a 30% federal tax credit up to $2,000. Traditional furnace + AC combos cost less upfront and work better in very cold climates (below 20°F). Modern cold-climate heat pumps now work efficiently down to -13°F and are increasingly cost-effective even in northern climates.
How long does HVAC installation take?
A simple HVAC replacement (swapping like-for-like with existing ductwork) takes 1 day. A full new HVAC system installation with existing ductwork takes 1–2 days. Installing new ductwork in addition to the HVAC system adds 3–5 days. Complex custom installations in tight spaces or large homes can take up to a week.
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Answer 5 questions for a cost range matched to your home and system.
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