How much does HVAC replacement cost?

HVAC replacement costs $4,000–$18,000 depending on system type and home size. Central AC only runs $4,000–$8,000 installed. A full system (furnace + AC) averages $7,000–$15,000. High-efficiency heat pumps range from $8,000–$18,000. Larger homes and high-cost markets push costs toward the top of these ranges.

How much does a new AC unit cost installed?

A new central air conditioner costs $4,000–$8,000 installed for a typical 2,000–2,500 sq ft home. The unit itself (2–5 ton capacity) is $1,500–$4,000, with installation labor adding $1,500–$3,500. High-efficiency SEER2-rated units cost more upfront but lower energy bills.

How long does an HVAC system last?

Central AC units last 15–20 years with proper maintenance. Furnaces last 20–30 years. Heat pumps last 15–20 years. If your system is over 15 years old and requiring frequent repairs, replacement is typically more cost-effective than continued repair.

What size HVAC system do I need?

HVAC sizing is measured in tons of cooling capacity. A general rule is 1 ton per 500–600 sq ft in moderate climates. A 2,000 sq ft home typically needs a 3–4 ton unit. Your contractor will perform a Manual J load calculation for an exact sizing recommendation.

HVAC Replacement Cost 2026: What to Expect

Updated May 2026 · Based on US regional contractor pricing data

Quick Answer: $4,000 – $18,000 Central AC only starts around $4,000 installed. A full system replacement (furnace + AC) averages $7,000–$15,000. High-efficiency heat pumps run $8,000–$18,000.

HVAC Replacement Cost by System Type

System Type	What's Included	Typical Cost (installed)
Central AC Only	Condenser unit + air handler/coil replacement	$4,000–$8,000
Gas Furnace Only	New furnace, flue inspection, filter media	$3,000–$7,000
Full System (AC + Furnace)	Condenser, air handler, furnace, thermostat	$7,000–$15,000
Heat Pump System	Air-source heat pump, air handler, smart thermostat	$8,000–$18,000
Mini-Split (per zone)	Single-zone ductless system, wall unit + compressor	$2,500–$5,500

Cost Factors

Factor	Impact on Cost
System size (tons)	Larger homes need larger units; each ton of capacity adds ~$500–$800
SEER2 efficiency rating	Higher SEER2 = lower energy bills but $500–$2,000 more upfront
Ductwork condition	If ducts need sealing or replacement, add $1,000–$5,000+
Electrical upgrades	Older panels may need a new 240V circuit; add $300–$1,000
Local market / labor	High-cost metros (NYC, SF, Seattle) run 30–50% above national average

Real Project Example — Outdoor HVAC Unit Replacement

This homeowner submitted photos of their aging outdoor condenser and indoor air handler. ProjectPrice generated tiered estimates before any contractor visit was needed.

Before

New HVAC unit fully installed — completed replacement

After

Frequently Asked Questions

Should I repair or replace my HVAC?

A common rule of thumb: if repair cost × system age exceeds the cost of replacement, replace. For example, a $1,500 repair on a 12-year-old system (12 × $1,500 = $18,000) exceeds a new system cost — replace it. Additionally, systems over 15 years old should generally be replaced rather than repaired due to refrigerant availability and efficiency improvements.

Are there rebates or tax credits for HVAC replacement?

Yes. The Inflation Reduction Act provides a 30% federal tax credit (up to $2,000/year) for qualifying heat pump installations. Many utility companies offer $200–$1,500 rebates for high-efficiency equipment. Check EnergyStar.gov and your utility's website for current offers in your area.

How long does HVAC replacement take?

A standard condenser swap takes 4–8 hours for one crew. A full system replacement (furnace + AC) typically takes one full day. Systems requiring new ductwork or electrical panel upgrades may take 2–3 days.

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