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HVAC Replacement Cost Calculator

Build a low, typical, and high range before comparing HVAC bids.

Estimate full HVAC replacement cost with equipment type, efficiency, ductwork, complexity, and rebates.

Start the tool How this estimate works Build decision packet Not sure where to start?

Plain English

How much might AC or heat replacement cost?

This gives a range and reminds you what may be outside the equipment price.

Start here: Enter home size, system type, ducts, access, and quote path.

Estimate inputs

Conditioned square feetsq ftBest description of the current setupA rough answer is fine. The point is to avoid replacing good furnace/blower/duct parts just because cooling failed.Scope you want to priceWhat the homeowner seesUse symptoms and what you were told. You do not need to know the failed part.Refrigerant label or tech claimIf the contractor says "Freon is phased out," choose R-22 only if they identified it on the unit or paperwork.Cooling coil / AC age if knownyrsA best guess is enough. If unknown, use the age of the outdoor AC or the last major replacement.What the quote or tech saysThis is about what you were told, not what is actually true yet.Furnace / blower age if knownyrsIf heat worked well last winter, the furnace/blower may still be useful even when cooling failed.Mini-split zones or headszonesMini-splits are planned by room/zone and BTU, not by pretending one wall head cools the whole home.Efficiency tierDuctwork scopeInstall complexityExpected rebates or credits$

Result

$18,130 to $27,416 range

Typical midpoint: $22,110; Before local quote differences and permit-specific items.
Rough capacity pressure: 4 tons; Sanity check only; ask for a load calculation.
Ductwork allowance: $1,760
Rebate/credit offset: $0
Symptom/history input: cooling dead
Furnace / blower age: 8 years
Cooling coil / AC age: 16 years
Refrigerant: Unknown

Flags to check

If refrigerant is unknown, identify it before deciding between repair, retrofit, or replacement.
Coil age alone does not force replacement, but leaks, rust, compatibility, and metering-device mismatch matter.
No quote is entered yet. Use the result as a question list before the first contractor visit.
Ask for duct scope, sealing, insulation, and balancing as separate line items.
The symptom you selected has cheap-failure possibilities. Make the technician document capacitor, contactor, thermostat, drain safety, airflow, and ice/refrigerant findings before sales scope.
Standard efficiency may be cheaper upfront but can leave savings on the table.
Access looks normal in this scenario; verify attic, closet, roof, or crawlspace constraints.

Options to ask for

Start with cheap symptom checks

Do this before accepting replacement as the only answer.

A dead or weak AC can be thermostat setup, drain float switch, capacitor, contactor, dirty filter, iced coil, condenser fan, or airflow before it is a full-system replacement.
Homeowners usually know symptoms; the technician should provide readings, failed-part evidence, and repair-vs-replace choices.

Pushback: Ask: what cheap causes did you rule out, what readings support your claim, and what is the repair price before replacement?

R-22 service or retrofit refrigerant

Still ask what refrigerant transition issue is actually driving the quote.

Existing R-22 systems can still be serviced with recovered, recycled, or reclaimed R-22.
Retrofit refrigerants can sometimes keep an R-22 system alive for several more years when the equipment is otherwise worth saving.
R-410A is not automatically a homeowner upgrade; often it is just the next regulatory/equipment platform.

Pushback: Ask: what is the reclaimed R-22 price, what retrofit refrigerant would you use, what capacity loss should I expect, and why is full replacement better?

Replace condenser and coil together

Only becomes a strong candidate after the tech proves the outdoor unit or coil is the real problem.

If the coil is 20+ years old, keeping it while replacing the condenser can be false economy.
If the condenser is changed, the matching coil, metering device, and refrigerant plan should be explicit.

Pushback: Ask: what is the coil age, is it leaking, is it compatible with the condenser/refrigerant, and what is the add-on price to replace it now?

Compressor-only repair

Do not start here unless a technician has actually proved a compressor failure.

Can be rational when the system is not near end of life and the indoor coil, blower, controls, and refrigerant circuit are clean.
Can be a bad deal when labor plus compressor cost approaches condenser or system replacement.

Pushback: Ask: what is the installed compressor price, what warranty applies, and why is this worse than condenser-only replacement?

Condenser plus indoor coil only

Strong counter-bid candidate.

Keeps a usable gas furnace, blower, cabinet, and ducts when the cooling side failed.
Useful when the contractor is quoting a full system mainly because the outdoor unit failed.

Pushback: Ask: can you quote condenser + matching coil while reusing the furnace/blower, and what exactly prevents that?

Keep gas heat and add mini-splits for cooling

Worth pricing when ducts are weak, only some rooms matter, or you want staged heat-pump coverage.

This is not one wall unit for the whole house. It means zone/head planning by room load.
Can reduce dependence on old ducts and lets the gas furnace remain backup heat.

Pushback: Ask: what rooms actually need heads, what BTU per room, where do line sets drain, and what electrical work is included?

Full system replacement

Can be correct when age, compatibility, safety, or multiple failures line up.

Best when furnace/air handler, coil, outdoor unit, controls, and ducts are all near end of life or incompatible.
Overkill when one component failed and reusable parts still have useful life.

Pushback: Ask: which parts are actually failed, what test readings prove it, which parts are reusable, and which replacements are being proposed mainly for warranty or sales simplicity?

Use this as a bid-comparison frame, not a final contractor quote.

A proper load calculation matters more than replacing the old tonnage automatically.

Tell each contractor you want at least one repair/partial-scope option and one full-scope option, with reasons why each is or is not viable.

Assumptions

Regional labor and brand differences can move actual bids.
Ductwork, access, warranty, and electrical/gas work should be broken out.

Decision check

Before you act on the number

The output is useful only if it survives the missing-scope, fragile-assumption, and next-step check.

Mistake check

Buying the replacement story before scope, diagnosis, ducts, warranty, or repair economics are clear.

What people forget

Cheaper service-call causes
Ducts, returns, zoning, and comfort distribution
Partial replacement or repair options
Rebate eligibility and payback limits

What makes it go bad

The quote replaces good parts
A new system still leaves comfort problems
The low bid excludes duct, electrical, permit, or warranty work

What to do next

Owners usually start with symptoms or repair-vs-replace, then compare repair, partial replacement, full replacement, and duct options.

Use the decision packet to compare scopes, missing measurements, warranty terms, and cheaper causes ruled out.

What changes the estimate

HVAC quotes move because of the homeowner symptom, system history, what the technician can prove with readings, equipment path, whether the furnace/blower/air handler still has useful life, line-set condition, duct scope, electrical or gas work, access difficulty, warranty length, and whether the contractor performs a real load calculation instead of replacing like-for-like tonnage.

The homeowner should describe what happened: dead outdoor unit, humming, warm air, ice, breaker trips, water safety shutoff, weak heat, short cycling, rooms that never get comfortable, or a recent thermostat change.
A same-size replacement can still be wrong if insulation, windows, additions, or usage changed.
Duct leakage and undersized returns can make a new system feel bad even when the equipment is good.
High-efficiency upgrades should be compared against realistic bill savings and rebate rules.
If a contractor names a failed compressor, condenser, coil, board, heat exchanger, or refrigerant leak, ask what test reading or visible evidence proves it and what smaller scope was ruled out.

Options worth pricing before a full replacement

Ask for more than one scope after the symptom has been tied to evidence. A useful HVAC bid can compare a service repair, compressor repair, condenser-only or condenser-and-coil replacement, full system replacement, duct repair first, or keeping a gas furnace for heat while adding mini-splits for cooling and staged heat-pump coverage.

Compressor-only repair can make sense when the system is not old, refrigerant type is serviceable, and the rest of the equipment is clean.
Condenser plus indoor coil can make sense when cooling failed but the furnace/blower is still solid.
Keeping the gas furnace for heat and adding mini-splits can make sense when ducts cool poorly, only a few rooms matter, or you want staged electrification.
Full replacement can still be right, but the contractor should explain why partial scopes fail on age, refrigerant, warranty, compatibility, safety, or labor economics.

Mini-split sanity check

A mini-split path should not be read as one generic "4 ton mini-split" on the wall. It usually means room-by-room load planning, indoor heads or ducted mini-split zones, line-set runs, condensate handling, electrical work, and possibly more than one outdoor unit. Ductwork allowance is not part of a ductless mini-split estimate; the cost pressure moves to zones, heads, line sets, and electrical.

R-22 and refrigerant scare tactics

Do not accept "your Freon is phased out" as the whole argument for full replacement. Existing R-22 systems can still be serviced with recovered, recycled, or reclaimed R-22, and many older systems can be converted to an approved retrofit refrigerant such as an R-407-family or R-438A-style replacement when the equipment condition justifies keeping it alive. That is real advice, not a sales brochure: a retrofit is not free and not always smart, but it can buy years when the compressor, coil, and airflow are still serviceable.

R-410A is not automatically an "upgrade" for the homeowner; it is often a regulation and availability transition path, and R-410A itself is being phased down in new equipment.
If the indoor coil is 20+ years old, plan to replace it, especially when replacing the condenser. Old coils leak first and can make a partial job false economy.
If the contractor says R-22 makes repair impossible, ask for the price of reclaimed R-22, the price of a retrofit refrigerant conversion, and the reason each option is rejected.
Recovered R-22 has value in the service chain. Ask whether refrigerant recovery is credited, charged, or simply treated as disposal.