HVAC Replacement Cost (2026): Furnace & AC Together

When both the furnace and the air conditioner are old, replacing them together avoids paying for two installations. Angi puts the average at $7,500, with most jobs between $5,000 and $12,500. New ductwork and extras such as HEPA filtration can push a project to about $22,000.

Furnace and AC together vs separately

Job	Cost	Source
Furnace and AC together	$7,500 average ($5,000 – $12,500)	Angi
Furnace and AC together, installed	$10,500 – $18,500	HomeGuide
Furnace alone	$4,800 average ($2,800 – $6,900)	Angi
AC alone	$3,900 – $8,000	Angi

Angi says replacing the AC now and the furnace later will likely cost more in total than doing both at once.

Cost by system type

System	Cost (Angi)
Split system	$3,800 – $7,500
Central air	$3,900 – $7,900
Heat pump	$4,200 – $7,600
Gas furnace	$3,800 – $10,000
Hybrid heat pump	$2,500 – $10,000
Ductless mini-split	$2,000 – $14,500
Packaged heating and air	$10,000 – $14,000
Geothermal heat pump	$4,500 – $24,500

A packaged unit puts heating and cooling in one cabinet outside or on the roof. A split system has a furnace or air handler inside and a condenser outside.

Cost by brand

Angi lists the average HVAC system at about $4,750 regardless of brand, with Amana or Coleman at about $3,000 and Trane or York often $6,000 or more.

Equipment by home size

AC size	Home size	Equipment only (Angi)
1.5 tons	600 – 1,000 sq ft	$2,000
2.5 tons	1,000 – 1,600 sq ft	$2,900
3 tons	1,600 – 2,000 sq ft	$3,000
3.5 tons	2,000 – 2,500 sq ft	$3,500

Furnace size	Home size	Equipment only (Angi)
40,000 – 60,000 BTU	800 – 1,200 sq ft	$2,000 – $4,500
75,000 – 100,000 BTU	1,500 – 2,000 sq ft	$2,500 – $5,900
120,000 – 140,000 BTU	2,500+ sq ft	$4,000 – $8,000

Labor, ducts and permits

Item	Cost (Angi)
Installation labor	about $1,500
Ductwork installation	about $3,500
Permits	$50 – $500

For duct prices, see ductwork replacement cost.

Ways to save

Angi says installing in spring or fall can save 10% to 15% on an AC.
Ask each contractor for a load calculation, not just a match to the old equipment size.
Compare a furnace and AC against a heat pump; see heat pump cost.

For single-system prices, see AC replacement cost and furnace replacement cost.

What "HVAC replacement" means

A full HVAC replacement usually covers the outdoor unit (an air conditioner or heat pump), the indoor coil, and the furnace or air handler. It can also include the thermostat, line set and parts of the ductwork.

Why replace the whole system at once

The indoor and outdoor parts are designed to work as a matched set.
Efficiency ratings depend on the matched system, not one part alone.
Labor is shared, so one project usually costs less than two separate ones.
Warranty coverage is cleaner when all parts are new.

Choosing a system

Gas furnace + AC: common where natural gas is available.
Heat pump + air handler: all-electric, efficient for mild winters.
Dual fuel: a heat pump with a gas furnace for backup.
Zoned or variable-speed systems: better comfort in larger or multi-story homes.

What affects the price

System size from a load calculation.
Efficiency levels and compressor type.
Ductwork repairs or redesign.
Electrical, gas line and permit work.
Brand, installer and warranty.

Getting comparable quotes

Ask each contractor for the exact model numbers, efficiency ratings, scope of ductwork and warranty terms in writing. Quotes that look very different are often for different equipment or a different scope of work.

Questions to ask

Did you do a load calculation, and can I see it?
What ductwork changes are included?
Who registers the warranty, and how long is the labor warranty?

In Texas

Texas summers put heavy demand on cooling systems. Many contractors are busiest in summer, so replacing an aging system in spring or fall can mean faster scheduling and less time in a hot house.

The parts of a full system

A typical split system has an outdoor unit (an air conditioner or a heat pump), an indoor coil, an indoor furnace or air handler with a blower, refrigerant lines, a thermostat and the ductwork. A "full HVAC replacement" usually means the outdoor unit, the coil and the furnace or air handler, plus new or reused refrigerant lines and a thermostat. Ductwork may or may not be included, so confirm what each quote covers.

Replacing everything at once

Replacing all the major parts together has several benefits. The indoor and outdoor parts are matched, which helps the system reach its rated efficiency and qualifies it for the full warranty. All the equipment starts with the same age, so you avoid having one part fail soon after another is replaced. The labor is also more efficient when the crew does everything in one visit.

The downside is the upfront cost. If one part is fairly new and in good shape, replacing only the failed part can make sense, as long as the new part matches the existing one.

Packaged units

Some homes have a packaged unit, where all the heating and cooling parts are in one cabinet outside, on the roof or beside the house, with ducts running into the home. Replacing a packaged unit is usually simpler because everything is in one box, but roof installations may need a crane.

How long the job takes

A straightforward replacement of a furnace and AC usually takes one to two days. Adding ductwork, electrical upgrades or a different system type can extend that. Ask the installer how long you will be without heating or cooling, which matters most during extreme weather.

Comparing quotes fairly

Get at least three quotes, and ask each contractor to provide:

The exact model numbers of every piece of equipment.
The efficiency ratings.
What is included: removal, permits, line set, pad, thermostat, ductwork changes and electrical work.
The warranty on equipment and labor.
Whether a load calculation was done.

Comparing only the total price can be misleading if one quote includes much more work than another.

Financing and rebates

Many HVAC companies offer financing, and some utilities offer rebates for high-efficiency equipment or heat pumps. Ask about rebates before choosing equipment, since some programs require specific models or pre-approval.

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Dallas	121	4.8	26,510
San Antonio	200	4.7	63,399
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Fort Worth	99	4.7	25,658
El Paso	66	4.5	11,208

HVAC Replacement Cost