How Much Does a New HVAC System Cost in 2026? Why Quotes Vary 2x

Most homeowners pay between $4,000 and $15,000 for a new central HVAC system in 2026. A full gas furnace plus air conditioner replacement for a 3-ton system runs $6,500 to $18,000, with an average around $10,500. A heat pump replacement of the same size runs $5,500 to $15,000. Those figures come from PickHVAC’s May 2026 pricing guide, and other cost sites publish different averages, so treat them as a range to test your quotes against.

People in r/hvacadvice regularly ask each other what they actually paid. The answers swing widely, and a quote of $7,800 next to one of $12,500 for what looks like the same system is a common worry. Most of the time nobody is cheating anyone. The two quotes describe different jobs.

What the main system types cost

System	Low	Average	High
Central split system, 2–3 ton, new install	$4,000	$7,500	$12,000
Gas furnace plus AC replacement, 3 ton	$6,500	$10,500	$18,000
Heat pump replacement, 3 ton	$5,500	$9,000	$15,000
Ductless mini-split, per indoor zone	$1,800	$3,500	$6,500
Ductwork, per linear foot	$10	$25	$50

By size, PickHVAC gives $3,500 to $8,000 for small homes (1.5 to 2 ton), $5,500 to $12,000 for 2.5 to 3.5 ton, and $9,000 to $18,000 for large homes at 4 to 5 ton. Installed cost per ton runs roughly $1,200 to $3,500.

A 3-ton replacement has a rough breakdown too. For a 2 to 3 ton central system, PickHVAC puts materials at $2,000 to $6,000, labor at $1,200 to $3,000, equipment at $600 to $2,000, permits at $50 to $500, and delivery and disposal at $100 to $400. The categories overlap, so do not expect them to add up exactly to the totals.

Why two quotes differ by $4,700

Take the two quotes above. The gap is $12,500 minus $7,800, which is $4,700. Here are the items PickHVAC lists as price drivers, with low and high ends:

Item	Low	High
Premium efficiency tier (20+ SEER)	$1,500	$4,000
Refrigerant line runs over 50 feet	$200	$800
Surge protector	$200	$800
Smart thermostat	$150	$400
Permits and inspections	$50	$800
Total	$2,100	$6,800

Add up the low column: $1,500 + $200 + $200 + $150 + $50 = $2,100. Add up the high column: $4,000 + $800 + $800 + $400 + $800 = $6,800. A gap of $4,700 sits comfortably inside that range, and that is before you count a larger unit (another $1,200 to $3,000 for each added ton) or any duct work.

I am not saying that is what happened in any particular thread. It shows that a $4,700 difference needs no markup tricks. Equipment choices alone can produce it.

What drives the spread

Equipment tier. Moving from SEER 14 to 16 adds $400 to $1,200, and 20+ SEER adds $1,500 to $4,000. PickHVAC notes that mid-efficiency equipment (14 to 16 SEER) can save $1,000 to $4,000 compared with premium units. Whether the extra efficiency pays back depends on how many hours you cool or heat.

Capacity. Each added ton costs $1,200 to $3,000. Contractors often size by rule of thumb, and DOE material says rules of thumb tend to oversize systems. An oversized unit cycles on and off more, which hurts efficiency and dehumidification. The correct method is a load calculation (ACCA Manual J), and the ENERGY STAR bid checklist suggests asking whether the contractor will run one and show you the paperwork. You can sanity-check a quote yourself with the Furnace Size Calculator and the Heat Loss Calculator.

Ductwork. This is the biggest swing. PickHVAC says ductwork beyond 100 linear feet can turn a job that would cost $1,000 to $2,500 into one that costs $5,000 to $12,000. Reusing ducts that are sealed and tested can save $0 to $2,000. If one quote includes new ducts and the other reuses old ones, the quotes cannot be compared directly. The Duct Size Calculator helps you see whether your existing runs can handle a bigger unit.

Where you live. PickHVAC reports the Northeast and West Coast run 15% to 30% above the Midwest baseline. Urban centers run 10% to 20% above suburban, and rural areas run 5% to 15% below suburban, though travel minimums of $150 to $500 may apply. On a $10,000 job, the coastal premium alone is $1,500 to $3,000.

Labor and access. Labor runs $75 to $125 an hour, usually 2 to 4 technicians over 6 to 16 hours. Multi-story work or crane use adds $500 to $3,000.

The tariff and refrigerant effect

Equipment prices rose sharply in the last few years. In January 2025, regulators began requiring R-454B refrigerant in new equipment. NBC News reported in May 2025 that the industry was short of it, and that Honeywell announced a 42% surcharge on R-454B in April of that year. The same story quoted a contractor saying a component that cost $1,000 in March would cost an estimated $1,300 to $1,400 by September.

Tariffs added uncertainty. NBC reported that the U.S. imported over $15 billion in air conditioners in the prior year, with Mexico accounting for 50% of that spending and China 19%. Trade groups disagree about whether the increases were justified. The air-conditioning trade group AHRI called the price-gouging claims offensive, and a contractor group president said manufacturers announced hikes “before it even became real.” I could not find a trustworthy current figure for how much of a 2026 quote is tariff cost. It is worth asking each contractor whether the quote includes a materials surcharge and how long the price holds.

How to compare quotes correctly

Put each quote into the same template before you look at the totals. Ask for the following in writing:

1. Exact equipment model numbers, tonnage, and SEER2 or HSPF2 rating.
2. Whether a load calculation was done, and a copy of it.
3. Duct work: what is being replaced, repaired, or reused, and whether they will test leakage.
4. Permits, inspection, and who pulls them.
5. Electrical work, thermostat, surge protection, and condensate drain.
6. Haul-away of the old unit and refrigerant recovery, which PickHVAC lists at $75 to $400 and $50 to $300.
7. Warranty terms for parts and labor, and who honors them.

PickHVAC’s own sample quotes show how far apart honest jobs can be: $4,800 for a 3-ton AC reusing ducts, $9,500 for a 3.5-ton heat pump at 16 SEER, and $17,800 for a 4-ton SEER 20 system with 150 feet of new ducts. All three are real HVAC systems. They are just different products and different scopes.

When a ductless system is the cheaper answer

If the house has no ducts, or the existing ones are in poor shape, the duct line can outweigh the equipment. PickHVAC prices a ductless mini-split at $1,800 to $6,500 per indoor zone, with an average of $3,500. Two zones at the average come to 2 × $3,500 = $7,000. Compare that with ductwork at $10 to $50 per linear foot: 100 feet of new duct is $1,000 to $5,000 before the central unit is even counted. The Mini-Split Cost Calculator prices a ductless setup for the rooms you actually need to heat and cool.

Worked example: budgeting a replacement

Say you have a 3-ton gas furnace and AC from the early 2000s and the ducts are in decent shape.

• Base range for a gas furnace plus AC at 3 ton: $6,500 to $18,000, average $10,500.
• Pick mid-efficiency equipment, 14 to 16 SEER: you stay near the average.
• Reuse sealed ducts: no ductwork line item.
• Add permit and inspection: $50 to $800.
• Add haul-away and refrigerant recovery: $75 to $400 plus $50 to $300.

A realistic budget is the average of about $10,500 plus roughly $200 to $1,500 in permits and disposal, so $10,700 to $12,000. If you live on the West Coast, add 15% to 30%, which puts the range at roughly $12,300 to $15,600. The Furnace and AC Replacement Cost Calculator will run this with your own inputs.

What to do next

Start with three itemized quotes, and ask each contractor to show their sizing math. If a quote is far above the others, ask which line items differ before you assume it is padded. If one is far below, ask what is missing. Scheduling in spring or fall may bring discounts of 5% to 15%. Check for state and utility rebates before you sign, because the federal tax credit for most efficient equipment ended with the 2025 tax year.

Sources

• PickHVAC: HVAC System Cost, New Installation and Replacement 2026
• NBC News: Tariffs are threatening your air conditioning bill this summer (May 2025)
• ENERGY STAR: HVAC quality installation contractor bid sheet
• U.S. Department of Energy: Energy Renovations HVAC guide
• U.S. Department of Energy Building America: Strategy Guideline on accurate heating and cooling load calculations