Hvac Cost Calculator
Get an instant cost estimate for your hvac project. Our calculator provides estimates adjusted for your state using regional cost indices.
How We Calculate Hvac Costs
Our HVAC calculator factors in equipment type (central AC, heat pump, furnace, or mini-split), system capacity in tons or BTUs, SEER2 efficiency rating, and whether existing ductwork needs modification. Labor costs are adjusted using regional mechanical contractor rates from BLS occupational data.
We show you a range (low, average, high) because actual costs depend on contractor pricing, material brands, project complexity, and local market conditions. Our data covers all 50 states and is updated quarterly. For the most accurate estimate, we always recommend getting 3+ quotes from licensed local contractors.
Frequently Asked Questions
How accurate is this HVAC calculator?
Our estimates cover equipment, labor, and permits for typical installations. The biggest accuracy variable is ductwork — if your existing ducts need repair or replacement, add $2,000-$7,000 to the estimate.
What SEER rating should I choose?
For most homeowners, 17-18 SEER2 offers the best balance of upfront cost and energy savings. In hot climates where AC runs 6+ months, consider 19-20 SEER2 for faster payback on the efficiency premium.
Is a heat pump better than a furnace?
In 2026, heat pumps are the better choice for most climates. They heat AND cool (replacing both furnace and AC), cost 30-50% less to operate, and qualify for a $2,000 federal tax credit. See our heat pump vs furnace comparison for details.
How long does HVAC installation take?
A straightforward equipment swap takes 1-2 days. If new ductwork is needed, expect 3-5 days. Switching system types (e.g., furnace to heat pump) takes 2-4 days.
Do I need a permit to replace my HVAC?
Yes. HVAC replacement requires a mechanical permit in virtually all jurisdictions. Your contractor should handle this. Expect $150-$400 for the permit fee.