HVAC cost calculator · Central air
Central AC Cost Calculator
Estimate the cost of installing a central air conditioning system based on home size, efficiency, ductwork, and local labor rates.
Average cost $5,500–$14,000
Quick Central AC Estimate
Get a localized installation range in seconds — no signup required.
Advanced Central AC Calculator
Personalize tonnage, efficiency, ductwork, climate, and upgrades for a detailed breakdown with financing.
What Is Central AC?
Central air conditioning cools your entire home through a single outdoor condenser and indoor air handler connected to ductwork. A thermostat controls temperature room-by-room via supply vents.
- Whole-home cooling — one system, even temperatures
- Duct-driven airflow — works with existing furnace ducts in most homes
- Thermostat controlled — programmable and smart thermostat compatible
Central AC Cost by Home Size
Installed averages at 16 SEER with existing ductwork — updates for your selected city.
| Home size | Avg installed cost | Typical tonnage |
|---|
Central AC Cost by SEER Rating
Higher SEER costs more upfront but lowers monthly cooling bills.
| SEER | Avg cost | Energy savings |
|---|
Central AC System Types
Compressor stage affects comfort, noise, efficiency, and price.
Two-stage
Variable-speed
Central AC Pros & Cons
Advantages
- Whole-home cooling from one system
- Quiet indoor operation (condenser outside)
- Strong resale value in ducted homes
- Consistent airflow to every room
Disadvantages
- Requires ductwork (not ideal for additions without ducts)
- Higher upfront cost vs window units
- Less room-by-room flexibility than mini-splits
Central AC vs Other Systems
Central AC vs Heat Pump
Cooling-only vs heat + cool in one system — compare installed costs.
Read comparison →Central AC vs Mini Split
Ducted whole-home vs ductless zoning — which fits your home?
Compare systems →Central AC vs Window AC
Whole-home comfort vs room-by-room budget cooling.
Full HVAC calculator →HVAC Systems by Type
Compare installed cost ranges for every major system.
Local Central AC Cost Factors
Based on the city selected in the calculator above.
National average
- Typical install: 3-ton · 16 SEER · existing ducts
- Peak season: Summer demand for AC replacements
- Sizing: ~1 ton per 500–600 sq ft (moderate climate)
- Efficiency: 16 SEER is the most common choice in 2026
Your city
Central AC Installation Timeline
System selection
1 day
Choose tonnage, SEER, and brand with your contractor.
Installation
1–2 days
Outdoor unit, indoor coil, refrigerant lines, and startup.
Duct adjustments
1–3 days
If needed — sealing, sizing, or partial replacement.
Inspection
Several hours
City permit inspection after install completes.
Best Central AC Brands
Price tiers and typical warranty coverage (2026).
| Brand | Price tier | Typical warranty |
|---|---|---|
| Carrier | $$$ | 10 yr parts · 1–5 yr labor |
| Trane | $$$ | 10 yr parts · registered labor |
| Lennox | $$$ | 10 yr parts · variable by series |
| Goodman | $ | 10 yr parts · budget-friendly |
| Rheem | $$ | 10 yr parts · solid mid-range |
Real Central AC Installation Examples
Based on the city selected in the calculator above.
National average
16 SEER central AC · 2,000 sq ft
- 3-ton · standard replacement
- Final cost: $9,200
Your city
16 SEER central AC · 2,000 sq ft
- 3-ton · existing ductwork
- Final cost: —
San Diego, CA — Local Cost Context
Prices on this page adjust for San Diego-area labor, permits, and climate — not a generic national template.
Labor
San Diego carries California coastal labor premiums. Title 24 energy code compliance adds scope to HVAC and window projects, and coastal corrosion requires specialized materials for roofing and exterior work.
Contractor labor runs about 28% above the U.S. average; typical permit fees in our model start around $395 for standard residential work.
Permits
City of San Diego Development Services and county jurisdictions require permits for virtually all structural, mechanical, and electrical work. Title 24 energy calculations are mandatory for HVAC replacements.
Climate
Mediterranean coastal climate with wildfire and salt-air factors:
- Mild year-round climate — moderate heating, significant cooling near inland valleys
- Salt air in coastal communities accelerates metal and fastener corrosion
- Wildfire ember zones inland require fire-rated roofing and vents
Top local projects
- Title 24–compliant HVAC upgrade — Required for permit — plan for higher equipment tier
- Tile or composition re-roof — Coastal and inland fire-zone material requirements
- Solar + battery — High electric rates and strong sun improve payback
Central AC Cost FAQ
How much does Central AC cost?
Central AC installation typically costs $5,500–$14,000 nationally in 2026, depending on home size, tonnage, SEER, ductwork, and location. Use the calculator above for a localized range.
What size AC do I need?
Plan on about 1 ton per 500–600 sq ft in moderate climates — a 2,200 sq ft home often needs a 3–4 ton unit. Hot climates may need slightly more capacity. Always confirm with a Manual J load calculation.
Is 16 SEER worth it?
For most homes, 16 SEER is the sweet spot: modest upfront premium over 14 SEER with meaningful energy savings. In hot states like Texas or Arizona, payback is often under 7 years.
Does installation include ductwork?
Standard replacement usually reuses existing ducts. New ductwork adds roughly $2,800–$6,500+ depending on home size — toggle it in the advanced calculator.
How long does installation take?
Most central AC replacements take 1–2 days for installation, plus permit lead time. Duct work or electrical upgrades can extend the schedule to 3–5 days.