What is the average cost of an HVAC job?

It depends which job. A service call to diagnose a problem is a small flat fee in most metros; a repair is typically a few hundred dollars; a full system replacement typically runs $5,000 to $16,000 installed. Ask the contractor which of the three you are being quoted for, because the word "job" hides all of it.

How much is an HVAC system for a 2,000 square foot house?

A 2,000-square-foot home is the reference size most cost guides use, and a complete air conditioner and furnace replacement for one commonly lands in the $7,000 to $16,000 range installed. Square footage alone does not size a system, though — ceiling height, insulation, windows and climate all feed into it, which is why a contractor should do a load calculation rather than match the old unit.

Is it cheaper to replace the AC and furnace at the same time?

Usually, yes, because you pay for one installation instead of two and the two pieces are matched to work together. It is worth asking the contractor to quote it both ways when only one component has failed, so you can see what the second half actually adds.

Does a new HVAC system come with a warranty?

Two separate ones, and you should ask about both. The manufacturer warrants the equipment, often for a long term but frequently only if the system is registered shortly after installation. The contractor separately warrants their labor, usually for a much shorter period. A great equipment warranty with a thin labor warranty still leaves you paying someone to come out.

Why are HVAC quotes so far apart for the same house?

Because the quotes are rarely for the same work. Different capacity, different efficiency tier, ducts included or not, permit included or not, and different labor warranties will all move a number without either contractor doing anything wrong. Make them quote comparable equipment before you treat the difference as a discount.

How much does it cost to replace an HVAC system?

Replacing a full HVAC system typically runs $5,000 to $16,000 installed. A straight swap that reuses your existing ductwork sits at the low end; adding or replacing ducts, or moving to a high-efficiency system, pushes toward the top. Angi's 2026 cost guide and the pricing pages Carrier and Bryant publish for their own customers all land in that band. Your house will land somewhere specific inside it, and the rest of this page is how to tell where.

The three quotes you are actually choosing between

What you are buying	Typical installed range	When this is your job
Basic change-out, existing ducts reused	$5,000 – $11,000	The old system worked and the ductwork is sound. Same footprint, same capacity.
Replacement with new or repaired ductwork	$7,000 – $16,000	Ducts are leaking, undersized, or missing in part of the house.
High-efficiency or premium equipment	$9,500 – $20,000+	Variable-speed or high-SEER equipment, often paired with a long warranty.

Installed ranges as published in 2026 cost guides. A quote outside these bands is not automatically wrong — ask what is in it.

The single biggest swing is not the brand on the box. It is whether your ductwork is coming out with the old system.

What moves your number

Ductwork. If the ducts are leaking or wrong for the new equipment, replacing them adds a substantial line to the quote — it is the item most likely to separate two otherwise similar bids.
Capacity. A bigger house needs more capacity, and capacity is the main thing you pay for. Guides commonly use a 2,000-square-foot home as the reference point, which is why you see that number everywhere.
Efficiency rating. Higher-efficiency equipment costs more up front and less to run. Whether that trade is worth it depends on your climate and your electricity rate, so ask the contractor to show the math for your house rather than in general.
System type. A heat pump, a gas furnace paired with an air conditioner, and a packaged unit are three different products at three different prices. Which one suits you is a climate and fuel question first.
Access and labor. A furnace in a tight attic or a crawlspace takes longer to swap than one in a garage, and labor rates vary by metro.
Permits and disposal. Both should appear on the quote. If they do not, ask whether they are included or coming later.

What a complete quote has on it

Model numbers for every piece of equipment, not just a brand name and a tier.
The capacity being installed, and a sentence on how they arrived at it. A contractor who sizes by copying the old unit is guessing.
Whether ductwork is being replaced, repaired, sealed, or left alone.
Permit and inspection, named as a line rather than assumed.
Haul-away of the old equipment.
The equipment warranty and, separately, the labor warranty. They are different lengths and people conflate them.
What happens to the price if they open a wall or an attic and find something unexpected.

How to read three bids against each other

Line the quotes up and compare the model numbers first, not the totals. A cheaper bid on smaller or lower-efficiency equipment is not cheaper, it is different. Once the equipment matches, the remaining gap is labor, ductwork, and what each contractor decided to include — and that gap is a conversation you can have out loud.

Get all three in writing on the same terms. If one contractor quotes ducts and two do not, you are not looking at three prices for one job. You are looking at two jobs.

Before you buy a whole system

If the old system is still running, work out whether replacing it is the right call at all. The $5,000 rule is the quick version: multiply the age of the equipment by the repair quote, and if it clears $5,000 you are probably replacing. We walk through it, and where it misleads, on our page about the $5,000 rule.

Whoever installs it matters more than which brand you pick — a good system installed badly underperforms a modest one installed right. We measure which HVAC companies AI assistants actually recommend, metro by metro. Nobody can pay to be on these lists.

Not your city? See every metro we measure.

Questions people ask next

What is the average cost of an HVAC job?: It depends which job. A service call to diagnose a problem is a small flat fee in most metros; a repair is typically a few hundred dollars; a full system replacement typically runs $5,000 to $16,000 installed. Ask the contractor which of the three you are being quoted for, because the word "job" hides all of it.
How much is an HVAC system for a 2,000 square foot house?: A 2,000-square-foot home is the reference size most cost guides use, and a complete air conditioner and furnace replacement for one commonly lands in the $7,000 to $16,000 range installed. Square footage alone does not size a system, though — ceiling height, insulation, windows and climate all feed into it, which is why a contractor should do a load calculation rather than match the old unit.
Is it cheaper to replace the AC and furnace at the same time?: Usually, yes, because you pay for one installation instead of two and the two pieces are matched to work together. It is worth asking the contractor to quote it both ways when only one component has failed, so you can see what the second half actually adds.
Does a new HVAC system come with a warranty?: Two separate ones, and you should ask about both. The manufacturer warrants the equipment, often for a long term but frequently only if the system is registered shortly after installation. The contractor separately warrants their labor, usually for a much shorter period. A great equipment warranty with a thin labor warranty still leaves you paying someone to come out.
Why are HVAC quotes so far apart for the same house?: Because the quotes are rarely for the same work. Different capacity, different efficiency tier, ducts included or not, permit included or not, and different labor warranties will all move a number without either contractor doing anything wrong. Make them quote comparable equipment before you treat the difference as a discount.

Written for homeowners by Most Recommended HVAC, which measures which HVAC companies AI assistants actually recommend in 26 U.S. metros. Nobody can pay to be on those lists. How we measure.