HVAC · Cost guide

How much does it cost to replace an HVAC system?

Updated 2026-06-03 · ~2 min read

"HVAC replacement" can mean just an AC condenser, just a furnace, or a full system — which is why quotes vary so much. Here's what a complete AC-plus-furnace replacement runs in 2026, and what pushes the number up or down.

Typical: $13,000

Most homeowners pay $7,000–$20,000 — full AC + furnace, installed, US national avg.

National average, professionally installed, as of 2026-06. Your price varies by market, scope, and what the crew finds — the factors below explain the spread. (Source: Angi/HomeGuide/CBS 2026.)

What drives the cost

Scope — a single component (just the furnace or just the AC) costs far less than a full matched system.
Size (tonnage/BTU) — a correctly sized system for your square footage; oversizing wastes money and comfort.
Efficiency rating — higher SEER2/AFUE equipment costs more up front but lowers energy bills.
Ductwork — repairing, resizing, or replacing ducts adds significantly; a heat-pump conversion may change requirements.
Brand, warranty, and local labor rates.

How your location changes the price

Climate drives equipment choice (heat pump vs. furnace + AC) and local labor rates vary widely. Some regions also offer utility rebates or tax credits for high-efficiency or heat-pump systems that meaningfully lower the net cost.

Signs it's time to replace

The system is 12–15+ years old and needing frequent repairs.
Rising energy bills with no change in usage.
Uneven temperatures, weak airflow, or it can't keep up on extreme days.
A major component (compressor, heat exchanger) has failed.

Can you DIY it?

Full HVAC replacement is a licensed-pro job — it involves refrigerant handling (EPA-regulated), gas or high-voltage electrical, and load calculations. Homeowners can handle filter changes and keeping the outdoor unit clear, but not the install.

Plan for it with HouseCue

HouseCue builds a private 5-year cost forecast for your home — so a big-ticket replacement like this is something you budget for on your terms, not a surprise. Track the age and condition of every system, get reminders before things fail, and connect with a vetted pro only when you choose.

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Frequently asked questions

Should I replace the AC and furnace at the same time?

Often yes, if both are near end-of-life. A matched system runs more efficiently and installing together saves on labor. If one unit is much newer, replacing only the failed component can make sense — ask the contractor to confirm the remaining unit is compatible.

Is a heat pump cheaper than a furnace and AC?

Equipment cost is comparable, and in many climates a heat pump replaces both heating and cooling in one system. With current utility rebates and tax credits, the net cost can be lower — and operating cost is often lower too. It depends on your climate and electricity rates.

How long does a new HVAC system last?

A well-maintained system typically lasts 15–20 years for a furnace and 12–15 for an AC condenser. Regular filter changes, annual service, and keeping the outdoor unit clear meaningfully extend that.

Related guides

Cost figures are US national averages for professionally installed work and are general educational information, not a quote. Actual prices vary by market, materials, scope, and site conditions — always get itemized estimates from licensed local pros.