How do I verify an HVAC contractor is licensed?

Visit your state's contractor licensing board website and search by company name or license number. In most states this takes under 2 minutes. You can also check that the contractor carries general liability and workers' compensation insurance by requesting certificates before work begins.

HVAC Cost Estimator 2025 — Real Local Prices

Q: How long does HVAC replacement take?

A standard replacement typically takes 4–8 hours. Ductwork sealing or replacement adds 1–2 days. Heat pump conversions from gas systems may require electrical panel upgrades and can take 1–2 days.

2025 Full-System Pricing

What a complete HVAC replacement costs across the US

All prices below reflect full system replacement — condenser, air handler or furnace, labor, and standard installation. Single-component swaps cost significantly less but rarely make sense on aging systems.

Metro area	Low estimate	High estimate	Cost factor	Notes
Los Angeles, CA	$9,500	$22,000	+18%	Full split system incl. air handler; high labor & permitting
New York, NY	$9,000	$21,000	+15%	Full system; NYC access & permitting complexity adds cost
Chicago, IL	$8,000	$17,500	+8%	Full furnace + AC; heating load increases scope
Houston, TX	$7,200	$14,500	+2%	Full split system; high demand but competitive market
Phoenix, AZ	$6,800	$14,000	-2%	Full system; pricing spikes June–Aug, plan ahead
Atlanta, GA	$6,800	$13,000	-5%	Full split system; competitive market, heat pumps popular
Denver, CO	$6,500	$14,000	0%	Full system; altitude spec requirements may add cost
Miami, FL	$7,200	$15,500	+5%	Full split system; humidity load increases equipment tier
Minneapolis, MN	$7,500	$16,500	+5%	Full furnace + AC; heating requirements add significant cost
Indianapolis, IN	$6,500	$12,000	-8%	Full system; lower labor costs, straightforward installs
Seattle, WA	$8,500	$18,000	+10%	Full heat pump system; adoption rising, so are prices
Dallas, TX	$6,800	$14,000	-2%	Full split system; large market with many competitive bids

Estimates are for full system replacement. Ductwork replacement, electrical panel upgrades, or difficult access points can add $1,000–$5,000. Always get 3 quotes before committing. Heat pump systems typically run 15–20% higher than central AC due to equipment cost.

The honest answer

Repair or replace? Here's how to actually decide

Most online guides give you a simple rule of thumb. The reality is more nuanced — it depends on your system's age, what broke, your energy bills, and what a full replacement would cost in your area.

Lean toward repair when…

→Your system is under 10 years old and still under manufacturer warranty

→The repair cost is less than 30% of full replacement cost

→The failed part is minor — capacitor, contactor, thermostat, or refrigerant top-up

→Your energy bills are stable and reasonable for your home size

→You're planning to sell the home within 2–3 years

Lean toward replace when…

→Your system is 15+ years old and experiencing its second or third failure

→The repair cost exceeds 50% of what a full new system would cost

→The compressor has failed — this is almost never worth repairing

→Your energy bills have risen 20%+ over the past few years

→The system uses R-22 refrigerant (phased out in 2020) — parts are scarce and expensive

$

The $5,000 rule — and why it falls short

The classic rule: multiply system age by repair cost, and if it exceeds $5,000, replace. It's a starting point, but it ignores efficiency losses, financing options, and regional replacement costs that can shift the math by thousands of dollars.

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Energy savings are real, but often overstated

Modern systems are 20–40% more efficient than units from 15 years ago. In practice that's $150–$400 per year in savings depending on your climate and usage — meaningful over a 15-year lifespan, but not enough to make a borderline replacement decision obvious.

Before you sign anything

How to read a contractor quote

Most homeowners accept the first quote they get. Here's what to look for — and what to push back on.

01

Check the SEER2 rating

SEER2 is the efficiency standard. Minimum is 14.3 in most states. Anything below that is outdated equipment being sold at a discount. Aim for 16–18 for meaningful long-term savings.

02

Equipment vs. labor breakdown

Equipment should be 50–60% of the total quote. If a contractor won't break it down, that's a red flag. You should be able to look up the model number and verify the equipment cost independently.

03

Permits are not optional

HVAC replacement requires a permit in most jurisdictions. If a contractor says permits aren't needed or offers to skip them to save money, walk away. An unpermitted system creates real problems when you sell.

04

Get exactly 3 quotes

One quote gives you nothing to compare. Two feels like a comparison but often isn't. Three quotes reliably surfaces the market price and usually reveals one outlier — high or low — that tells you something important.

05

Ask about Manual J load calculation

A Manual J formally determines the right system size for your home. Most contractors skip it and size by square footage alone — which leads to oversized systems that short-cycle and wear out faster.

06

Warranty: equipment vs. labor

Equipment warranties (5–10 years) are from the manufacturer. Labor warranties (1–10 years) come from your contractor — quality companies often offer longer coverage, so always ask. Get both in writing before work starts.

Common questions

HVAC replacement FAQ

How accurate is this estimate? ↓

Our estimates are based on regional contractor pricing data and are accurate within ±20–30% for most standard full-system installations. Complex situations — difficult attic access, ductwork that needs replacement, older homes with non-standard configurations — can push costs higher. We always recommend getting at least 3 local quotes to validate any estimate.

What time of year is cheapest for HVAC replacement? ↓

Fall (September–November) and spring (March–May) are typically the cheapest times. Demand drops significantly between peak summer and winter seasons, and many contractors offer discounts to keep crews busy. Scheduling during these windows can save 10–15% compared to emergency replacements.

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

If both units are over 12 years old and one has failed, replacing both together usually makes financial sense. You save on labor (one installation visit instead of two), the equipment is designed to work together for maximum efficiency, and you avoid another large replacement in 2–3 years. If only one unit is near end of life, replacing separately is reasonable.

Are there tax credits available for HVAC replacement? ↓

Yes. Under the Inflation Reduction Act, homeowners can claim a federal tax credit of up to 30% — capped at $600 for central AC and $2,000 for qualifying heat pump systems. Many states and utilities also offer rebates on top of that. Check ENERGY STAR's rebate finder tool for your ZIP code before you buy.

How long does HVAC replacement take? ↓

A standard full-system replacement with existing ductwork in good shape typically takes 4–8 hours. If ductwork needs sealing or partial replacement, add 1–2 days. Heat pump conversions from gas systems may require electrical panel upgrades and can take 1–2 days total. Ask your contractor for a written timeline before scheduling.

What's the difference between a heat pump and central AC? ↓

Central AC only cools. A heat pump both cools and heats by moving heat rather than generating it — making it 2–3x more efficient for heating than a gas furnace in mild climates. In very cold climates (regularly below 20°F), a heat pump may need a supplemental heat source. Modern cold-climate models can now operate efficiently down to -13°F.

How do I verify that an HVAC contractor is licensed? ↓

Visit your state's contractor licensing board website and search by company name or license number — this takes under 2 minutes in most states. Also verify the contractor carries both general liability insurance and workers' compensation by requesting current certificates before any work begins. Any reputable contractor will provide these without hesitation.

Transparency

How we calculate your estimate

Our estimator uses a straightforward formula. Here's exactly what goes into the numbers — and where the margins of error are.

Step 1

System size

Required tonnage = sq ft ÷ 600, rounded to nearest 0.5 ton. Adjusted for climate zone via your ZIP prefix.

Step 2

Base cost range

We apply $3,500–$7,500 per ton for a full system. Heat pumps carry a 15% premium; furnace+AC combos 20%.

Step 3

Location factor

A regional multiplier (0.90–1.18) based on your ZIP's first digit, reflecting local labor and permitting costs.

Step 4

Complexity factor

Each issue reported adds up to 5% to the estimate, accounting for installation complexity and risk.

Step 5

Repair/replace score

Weighted scoring across system age (35%), issue severity (25%), energy efficiency (20%), and quote analysis (20% if provided).

Honest caveat

±20–30%

This is a directional estimate, not a quote. Ductwork, electrical upgrades, and access difficulty are not included. Always get 3 contractor quotes.

Stop guessing what your HVAC should cost.