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HVAC Installation Cost Calculator — By System Type & Home Size
A full HVAC system costs $3,750–$12,000 installed in 2026, including equipment, labor, and startup. 2026 pricing reflects the R-454B/R-32 refrigerant transition, which adds roughly 10–15% to equipment cost.
2026 national range
$3,750–$12,000/ full system
Typical 2.5-ton system (~2,000 sq ft), mid-range brand, existing ductwork. 2026 pricing reflects the R-454B/R-32 A2L refrigerant transition.
- Central AC only$2,350–$4,750
- Heat pump$2,900–$5,600
- Gas furnace$1,500–$3,000
- Full central HVAC$3,750–$6,900
Educational calculators — always consult a licensed professional before making financial decisions.
Your HVAC system
Complete ducted system: new AC unit and new gas furnace installed together. This is the “furnace + AC replacement” job, and also the whole-system path for a new HVAC system.
A changeout reuses the line set, pad, circuit and stat wiring. A first install has to create all four.
Furnace + AC replacement, or a straight swap of either. Removal and disposal of the old equipment is already inside the labor figure.
Square footage sets the tonnage. The metro is optional and adjusts for local HVAC labor rates.
Leave on national, or pick your metro to adjust for local HVAC labor rates.
No local adjustment — the national figures as the sources publish them.
Mid-size home, 3–4 bedrooms. Typically needs a 3–3.5 ton unit.
Meets minimum federal requirements. Lower upfront cost, higher operating costs. Good if budget is tight.
Brands like Lennox, Carrier, or Trane mid-tier. Balance of reliability, efficiency, and warranty (10 years).
On a ducted system, how hard the space is to work in moves labor more than anything else on the quote.
The reference case. Open working room at ground level, easiest access.
Your current ducts are in good shape and sized correctly. Saves $2,000–$8,000.
Select all that apply. Each is a separate line on a real bid.
Estimated Installation Cost
$3,740 – $6,920
2.5-ton replacement, fully installed — National average
Cost Breakdown
Where Your Money Goes
Your Selections
Where these numbers come from. Equipment and labor come from this page’s sourced dataset — AC Direct on the R-454B refrigerant uplift, the BLS Producer Price Index for HVAC equipment, and the EPA AIM Act technology-transition rule, all retrieved 2026-07-13. No local adjustment is applied — pick a metro above to scale for local HVAC labor rates. The first-install extras, the equipment-location labor factor and the four separate line items are ESTIMATED planning brackets: no source in that dataset publishes them. The line set is the one whose direction is sourced — the 2026 A2L refrigerant transition is why many existing line sets cannot be reused on a changeout. A replacement adds nothing on the job-type line because removal and disposal of the old equipment is already inside the sourced labor band.
Estimates based on national averages. Actual costs vary by region and contractor.
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What you'll need
- System type — AC only, heat pump, furnace, or full HVAC
- Home square footage
- Ductwork condition — existing, needs repair, or new
What you'll get
- Installed total — Equipment + labor combined
- System sizing — Calculated tonnage for your home
- Cost breakdown — By equipment, labor, and ductwork
How it works
Select system type
Choose from central AC, heat pump, gas furnace, or a full HVAC system.
Enter home details
Provide square footage, number of stories, and ductwork condition.
Get your estimate
Receive a cost range covering equipment, labor, permits, and startup.
Prices above are national. For labor adjusted to your metro's wages, see the HVAC installation cost by city guides.
2026 HVAC Installation Cost Ranges
2026 refrigerant update: new residential systems must now use a low-GWP refrigerant — R-454B (Carrier, Trane, Lennox, Rheem) or R-32 (Daikin, Amana, Goodman) — instead of R-410A. This adds roughly 10–15% to equipment cost. Existing R-410A systems are not banned and can still be serviced and recharged.
| System Type | Standard | High Efficiency |
|---|---|---|
| Central AC only | $2,350–$4,750 | $3,250–$6,400 |
| Heat pump | $2,900–$5,600 | $4,000–$7,500 |
| Gas furnace | $1,500–$3,000 | $2,000–$4,000 |
| Full central HVAC | $3,750–$6,900 | $5,400–$9,700 |
Typical 2.5-ton system (~2,000 sq ft), mid-range brand, existing ductwork. 2026 pricing reflects the R-454B/R-32 A2L refrigerant transition.
Heat pump vs. furnace + AC vs. mini-split
Three different ways to heat and cool a home, priced separately — which one applies depends on whether you have ductwork and whether you're replacing one system or two:
| System | Installed cost | Calculator |
|---|---|---|
| Heat pump (ducted) | $2,900–$7,500 | Calculator above (select "Heat pump") |
| Furnace + AC (separate systems, bundled) | $5,000–$12,500 | Furnace & AC Replacement Cost Calculator |
| Mini-split (ductless heat pump) | $1,150–$8,800 | Mini Split Installation Cost Calculator |
A ducted heat pump replaces both a furnace and an AC condenser with one system — priced above in the main table. A furnace + AC bundle keeps the two systems separate but installs them together, which is the more common like-for-like replacement job. A mini-split is the option when there's no ductwork to reuse — a garage, an addition, or a home that was never ducted.
Only replacing the AC side and keeping your existing furnace? The Central Air Installation Cost Calculator prices that alone — $3,500–$12,500 installed, by SEER2 tier and climate zone.
What moves the price up or down
- System type & size. A heat pump or full central system costs more than an AC-only or furnace-only swap; every extra ton adds roughly $800–$1,500.
- Efficiency (SEER2/AFUE). Jumping from base to high-efficiency adds 20–40% upfront but lowers running costs.
- Ductwork. Existing, good ducts cost nothing; sealing runs $800–$2,500 and full new ductwork $4,000–$8,000 — price your own run with the Ductwork Installation Cost Calculator.
- 2026 refrigerant transition. The R-454B/R-32 changeover adds ~10–15% to equipment.
- Brand tier & access. Premium brands run 20–30% more; tight attic/crawl access and long line sets add labor.
- Region & season. Quotes vary 20–40% between contractors for identical equipment — always get three.
Repair or replace?
The "$5,000 rule": multiply the repair cost by the unit's age. If the result tops $5,000, replace. A $600 repair on a 10-year-old system = $6,000 → replace. Also lean toward replacement when:
- The system is 12–18+ years old (typical HVAC lifespan) or out of warranty.
- It still uses R-22 refrigerant (expensive, phased out) — recharges are throwing money away.
- The compressor or heat exchanger has failed — those are the most expensive parts.
- Energy bills are climbing and comfort is uneven room to room.
Repair when the unit is under ~8 years old, still under warranty, and the fault is a capacitor, contactor, or fan motor — cheap parts that don't signal end of life.
Replacing the furnace and AC together
This page's Full Central HVAC figure — $3,750–$9,700 — is a new furnace and new AC condenser installed together, priced as equipment + standard labor with existing ductwork reused (2026 A2L/R-32 equipment pricing; see Methodology below). It is not the same number as the Furnace & AC Replacement Cost Calculator's bundled figure ($5,000–$12,500). The two pages draw on different sourced datasets (this page: AC Direct and BLS PPI; the replacement calculator: Angi's 2026 HVAC replacement data) that price the same real-world job differently, and neither dataset states why the figures diverge — we are not going to guess at a reason neither source gives. If you are swapping out an aging furnace and AC together, use the replacement calculator for the itemized, scope-specific number.
Replacing an existing furnace and AC rather than installing a system from scratch? The Furnace & AC Replacement Cost Calculator prices it by scope — furnace only, AC only, both bundled, or a heat-pump swap — which is how replacement quotes are written.
AC replacement cost & HVAC replacement cost
For most homeowners, AC replacement cost and HVAC replacement cost mean the same job priced on this page: swapping an aging system for new equipment. Central AC replacement runs $2,350–$6,400; a gas furnace replacement runs $1,500–$4,000; replacing a full HVAC system — furnace and AC together — runs $3,750–$12,000 installed in 2026, the same installed-price figures as the table above (Typical 2.5-ton system (~2,000 sq ft), mid-range brand, existing ductwork. 2026 pricing reflects the R-454B/R-32 A2L refrigerant transition.).
Searching for a furnace and AC replacement cost calculator that quotes a narrower number? That's scope, not disagreement — see "Is HVAC pricing the same for a new install and a furnace and AC replacement?" below, or go straight to the Furnace & AC Replacement Cost Calculator.
Efficiency ratings, explained
- SEER2 — cooling efficiency (higher = cheaper to run). 2026 minimums: 13.4 in the North, 14.3 in the South; 15–16 SEER2 is the value sweet spot.
- AFUE — furnace efficiency. 80% is the floor; 90–97% is high-efficiency and can cut heating bills ~15–20% in cold climates.
- HSPF2 — heat-pump heating efficiency; 7.5+ is efficient. Cold-climate heat pumps now work down to about −13°F.
No ductwork on site, or adding a room without extending the trunk line? A ductless heat pump is a separate job with its own pricing — see the Mini-Split Installation Cost Calculator.
What size system do I need?
The rule of thumb is ~1 ton per 400–600 sq ft (an 1,800 sq ft home ≈ 3 tons), but that's only a starting point. Insist on a Manual J load calculation that accounts for insulation, windows, orientation, and climate. An oversized unit short-cycles (humid, uneven, worn out early); an undersized one never keeps up. No Manual J = walk away.
Replacing the furnace and AC together, on the same schedule, is a different job than sizing this system alone — see the furnace + AC replacement calculator when both units are due at once.
| System size | Central AC only | Heat pump |
|---|---|---|
| 2-ton (~800–1,200 sq ft) | $1,950–$4,000 | $2,500–$4,850 |
| 2.5-ton (~1,000–1,500 sq ft) | $2,350–$4,750 | $2,900–$5,600 |
| 3-ton (~1,200–1,800 sq ft) | $2,750–$5,500 | $3,300–$6,350 |
| 3.5-ton (~1,400–2,100 sq ft) | $3,150–$6,250 | $3,700–$7,100 |
| 4-ton (~1,600–2,400 sq ft) | $3,550–$7,000 | $4,100–$7,850 |
| 5-ton (~2,000–3,000 sq ft) | $4,350–$8,500 | $4,900–$9,350 |
ESTIMATED — derived from this page's sourced 2.5-ton baseline (below) and its published $800–$1,500-per-ton adjustment, not an independently sourced by-tonnage study. Square footage ranges use the ~1 ton per 400–600 sq ft rule of thumb above and will not match every home — get a Manual J load calculation for an exact size before you buy.
Brand tiers
- Value: Goodman, Amana, Payne — lower upfront, solid reliability, shorter warranties. Use R-32.
- Mid-range: Rheem, Ruud, York, Bryant — good balance of price, efficiency, and dealer network.
- Premium: Carrier, Trane, Lennox — quietest, highest-efficiency options, longest warranties, ~20–30% more. Use R-454B.
Installation quality matters more than brand — a mid-tier unit installed well outlasts a premium unit installed poorly.
Questions to ask — and red flags
Ask every contractor:
- Will you do a Manual J load calculation (not just match the old unit)?
- Is the quote itemized — equipment, labor, ductwork, permits, thermostat?
- Are you licensed, insured, and NATE-certified? Can I see the model numbers?
- What's the parts and labor warranty, and does registration affect it?
Red flags:
- No Manual J — sizing by rule of thumb only.
- A verbal or one-line quote with no model numbers.
- High-pressure "today only" pricing.
- Quoting a condenser swap without checking indoor-coil compatibility.
Warranty, timing & financing
- Warranty: most systems carry a 10-year parts warranty — but only if you register within 60–90 days. Labor warranty (1–2 years) is separate; ask about heat-exchanger and compressor terms.
- Best time to buy: shoulder seasons (spring/fall) are cheapest. An emergency August or January replacement costs the most and gives you the least leverage.
- Financing: many contractors offer 0% promotional or fixed-rate financing — a $9,000 system is often ~$150/month. Check state and utility rebates (via DSIRE) before you sign; the federal 25C tax credit ended after Dec 31, 2025.
What's included in an HVAC quote — and what isn't
Usually included
- Condenser / air handler / furnace
- Labor and standard installation
- New line set, pad, and whip
- Basic (non-smart) thermostat
- Permit and inspection
- Old-unit removal and disposal
Often extra
- New or repaired ductwork ($2,000–$8,000)
- Electrical panel upgrade ($1,300–$3,000)
- Smart thermostat ($150–$400)
- New pad, crane, or roof curb
- Zoning dampers / extra returns
- Asbestos or mold remediation
Frequently asked questions
How much does HVAC installation cost?
HVAC installation costs $3,750–$12,000 for a full central system. Central AC only runs $2,350–$4,750. A gas furnace costs $1,500–$3,000. A heat pump system costs $2,900–$5,600. High-efficiency systems cost 20–40% more upfront but can save on energy costs. Ductwork installation or replacement adds more if needed.
What size HVAC system do I need?
HVAC sizing is calculated in tons (BTU capacity). Rule of thumb: 1 ton per 400–600 sq ft in a well-insulated home. A 1,800 sq ft home typically needs a 3-ton system. However, proper sizing requires a Manual J load calculation that accounts for climate, insulation, window area, and home orientation. An oversized system short-cycles and an undersized one can't keep up — both reduce efficiency and lifespan.
Heat pump vs. furnace and AC: which is better?
Heat pumps are more efficient than furnaces in mild to moderate climates (above 30°F). Traditional furnace + AC combos cost less upfront and work better in very cold climates (below 20°F). Modern cold-climate heat pumps now work efficiently down to -13°F and are increasingly cost-effective even in northern climates. Note: the federal 25C tax credit that gave up to $2,000 on a qualifying heat pump ended for systems placed in service after December 31, 2025, but state and utility rebates may still apply — check DSIRE (dsireusa.org).
How long does HVAC installation take?
A simple HVAC replacement (swapping like-for-like with existing ductwork) takes 1 day. A full new HVAC system installation with existing ductwork takes 1–2 days. Installing new ductwork in addition to the HVAC system adds 3–5 days. Complex custom installations in tight spaces or large homes can take up to a week.
What is R-454B and why is my new HVAC system more expensive in 2026?
Since January 1, 2026, all new residential HVAC systems must use a refrigerant with a global warming potential (GWP) under 700. The long-standing R-410A (GWP 2,088) is being replaced by low-GWP A2L refrigerants: R-454B (GWP 466 — used by Carrier, Trane, Lennox, Rheem, York, MRCOOL) and R-32 (GWP 675 — used by Daikin, Amana, Goodman). New systems add integrated leak detection and A2L-rated components, raising equipment cost by roughly 10–15%. New A2L tooling for contractors, 2026 tariffs, and higher labor costs push quotes up further.
Is R-410A banned? Do I have to replace my working AC in 2026?
No. R-410A is not banned — existing systems can be serviced, repaired, and recharged indefinitely. Only new system installations are restricted to low-GWP refrigerants as of January 1, 2026, so you do not need to replace a working AC. Note that R-410A production was cut about 40%, roughly doubling recharge costs (around $50–$100 per pound installed). A2L systems cannot be retrofitted from R-410A, and a new A2L outdoor unit may not match an older indoor coil — which is why more homeowners are now quoted a full matched-system replacement rather than a condenser swap.
How much does AC replacement cost or HVAC replacement cost?
AC replacement cost and HVAC replacement cost usually mean swapping an aging system for new equipment, which is exactly what this calculator prices. Central AC replacement runs $2,350–$4,750, a gas furnace replacement runs $1,500–$3,000, and a full HVAC replacement (furnace and AC together) runs $3,750–$12,000 installed in 2026 — the same figures shown in the cost table above. A furnace and AC replacement cost calculator that quotes a narrower range is pricing a different scope (existing ductwork, line set, and thermostat already in place); see the next question for how the two differ.
Is HVAC pricing the same for a new install and a furnace and AC replacement?
No — the two are priced on different scopes, even though both fall under general HVAC pricing. This page covers installing a system from scratch, so the range includes equipment, labor, ductwork condition, and permits together. A furnace and AC replacement swaps existing equipment on ductwork, a line set, and a thermostat that are usually already in place, which narrows the range because there's less site work to quote. If you're looking for an HVAC replacement cost estimator for a like-for-like swap rather than a new build, use the Furnace & AC Replacement Cost Calculator instead — it prices replacement by scope (furnace only, AC only, both bundled, or a heat-pump swap), which is closer to how a replacement quote actually gets written.
Methodology & sources
The cost figures on this page are generated from a single, sourced cost-data file (Typical 2.5-ton system (~2,000 sq ft), mid-range brand, existing ductwork. 2026 pricing reflects the R-454B/R-32 A2L refrigerant transition.). A2L transition (Jan 1, 2026) adds ~10–15% to equipment cost on refrigerant-bearing systems; midpoint 12% applied. Premium equipment and new ductwork push the top of the range higher. Last verified July 2026.
- EPA AIM Act — Technology Transition Rule (GWP < 700 for new residential systems, Jan 1 2026) — retrieved 2026-07-13
- AC Direct — R-454B: What Every Homeowner Buying HVAC in 2026 Needs to Know (10–15% equipment uplift) — retrieved 2026-07-13
- BLS Producer Price Index — HVAC equipment (series PCU3334153334151) — retrieved 2026-07-13
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HVAC Installation Cost Calculator is built and maintained by the RealCostIQ editorial team. Cost ranges and rates are checked against published industry data and contractor quotes, and revised when the underlying figures move. Read our data methodology or more about who builds this. Every calculation runs in your browser — no account, and none of your inputs are stored.
Cost ranges and rates here are checked against contractor quotes and published industry data. If a number still looks off, email Support@RealCostIQ.com and we'll review and fix it.