Comparing a heat pump with central air is not just an equipment-price exercise. A heat pump provides heating and cooling, while central AC normally needs a furnace or another heating source. Use equivalent scope and your own quotes so the comparison reflects the full system each option must provide.
Check what each contractor includes before comparing prices →
Heat pump vs AC cost calculator
Enter contractor quotes when available. Default dollar amounts are illustrative inputs, not U.S. price estimates. Annual operating figures must include cooling and the heating source used with each option.
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Save the installed-cost assumptions, ownership totals and modeled difference.
Heat pump vs central air cost: start with the same job
A central air conditioner cools. A central ducted heat pump cools and heats. That difference changes the quote: the comparison only makes sense when both proposals cover the same heating and cooling needs. If your existing furnace is in good condition and will remain in service beside a new AC, enter $0 for new furnace installation in the calculator. If a furnace must be replaced as part of the alternative, include its full installed scope. A heat pump may also need auxiliary or dual-fuel heat; include that equipment in its installed quote instead of assuming the outdoor unit is the entire system.
Start with the HVAC replacement cost calculator to organize project inputs, then use the comparison form above with contractor proposals for the two actual options. The numbers prefilled in the form are arithmetic examples only. They are not current prices, typical U.S. costs, contractor bids, or a prediction for your home.
What the calculator actually adds
The heat-pump modeled total equals installed heat-pump cost minus an incentive you can actually claim, plus heat-pump annual operating cost multiplied by ownership years. The AC option equals installed AC cost plus incremental new heating-system cost, plus combined AC-and-heating annual operating cost multiplied by the same years. “Incremental” matters: a furnace that will be retained has no new installation charge in this project, although its ongoing fuel and maintenance still matter. Do not enter the current furnace’s original purchase price as if you will pay it again.
Written as formulas: heat-pump total = heat-pump installed cost − confirmed incentive + (annual heat-pump operation × years); AC-plus-heat total = AC installed cost + new heating-system cost + (annual AC-and-heat operation × years). The difference is the gap between these totals. A lower modeled total does not prove a system will heat your home adequately or deliver the same comfort. Installation quality and equipment suitability come first.
Worked example: replacing both heating and cooling
Suppose two hypothetical, equally scoped bids cover a 10-year planning period. The heat-pump package is entered as $13,000 installed, with $1,400 per year for heating and cooling. The separate AC package is entered as $8,500 installed, a new furnace as $6,000, and $1,900 per year for both systems combined. With no assumed incentive, the heat-pump model is $13,000 + (10 × $1,400) = $27,000. The AC-plus-furnace model is $8,500 + $6,000 + (10 × $1,900) = $33,500. The difference is $6,500 in this illustration. These are chosen numbers to demonstrate the calculation, not quoted market prices.
Now change one scope fact: the homeowner keeps a serviceable furnace. New furnace cost becomes $0, so the AC-plus-heat installation subtotal falls to $8,500 and its modeled 10-year total becomes $27,500 if the $1,900 annual assumption still reflects the retained furnace. The modeled gap narrows to $500. That is why the heating-equipment line must match the work actually proposed. It may also change the expected ownership period if the retained furnace will need replacement soon; model that future work separately instead of hiding it in the AC bid.
Build low, typical and high planning cases from your own inputs
Use three scenarios to see which assumptions drive the decision. A low-scope case might reuse sound ducts and the existing electrical circuit, require no new heating equipment with AC, and include only verified rebates. A typical-scope case should match the line items on comparable written bids: selected indoor and outdoor units, controls, installation, disposal, permits and any documented duct or electrical work. A high-scope case includes discovered duct repairs, an electrical upgrade, needed backup heat or a furnace replacement, where those conditions actually apply. These labels describe project scope, not promised price bands. Ask contractors to price the same scope so the scenarios remain comparable.
For equipment capacity, ask for a heating and cooling load calculation, not just a replacement of the existing unit’s nominal tonnage. ENERGY STAR advises homeowners to have a contractor use Manual J when sizing an air-source heat pump. Our heat-pump sizing guide explains what to request and why winter performance matters. A central ducted heat pump may use existing ducts, but the ducts still need inspection for leakage, airflow and fit. ENERGY STAR’s quality-installation guidance calls out duct inspection and proper refrigerant charge as part of a sound installation.
Compare the scope of two HVAC quotes
A lower total may exclude work the other proposal includes. Tick an item only after its scope is confirmed in writing. An unticked item means “ask the contractor,” not automatically “excluded.”
| Item to verify | Quote A | Quote B |
|---|---|---|
| System and heating scopeExact outdoor/indoor models; retained or replaced furnace; backup heat and controls. | ||
| Sizing and winter performanceWritten heating/cooling load calculation; selected capacity and climate suitability. | ||
| Ducts and airflowInspection, leakage testing, repairs, transitions and airflow verification; identify exclusions. | ||
| Electrical and controlsPanel/circuit capacity, disconnect, wiring and thermostat; itemize any upgrade allowance. | ||
| Installation and removalOld-system disposal, pad/stand, refrigerant lines, condensate work and startup checks. | ||
| Permits and inspectionWho obtains required local permits, pays fees and arranges inspections. | ||
| Warranty and serviceSeparate equipment and labor coverage; registration duties and maintenance conditions. | ||
| Operating costs and incentivesHeating plus cooling in both estimates; utility assumptions and documented incentive eligibility. |
Your entries stay on this page and are not submitted or saved. Print or save as PDF before leaving. Confirm local requirements and equipment suitability with the contractor; this is a homeowner discussion worksheet, not a certification checklist.
What should be in each written quote
Request exact model numbers for the outdoor unit, indoor coil or air handler, furnace where applicable, controls and backup heat. Ask whether the quoted labor includes removal, new pad or stand, refrigerant-line work, condensate management, electrical disconnect, panel or circuit changes, duct transitions, balancing, permits, inspection and startup measurements. Clarify any allowance for unexpected work. The contractor quote comparison tool helps place those inclusions side by side before you focus on the total.
Separate exclusions just as carefully. This calculator does not include financing, maintenance, repairs, future replacement, future energy-price changes, tax effects, equipment life, comfort value or resale value. It subtracts an entered incentive immediately, so only use a rebate or tax benefit after checking current eligibility, timing, documentation and whether it actually lowers your out-of-pocket cost. If a contractor’s price includes an incentive already, do not subtract it a second time.
Estimate operation with local evidence
Annual operation depends on your climate, utility tariffs, fuel type, thermostat settings, envelope, duct losses and system performance. Begin with your own electric and fuel bills, then ask bidders to state the assumptions behind any projected savings. A heat pump’s heating output and efficiency vary with outdoor temperature, and a cold-climate installation may involve auxiliary heat or dual-fuel controls. U.S. Department of Energy guidance describes these system types and their operating considerations. Avoid applying a single national savings claim to your home.
Keep the annual figures consistent. If the heat-pump number includes cooling plus heating, the AC-side number must include cooling plus the furnace or other heat source. If an electric bill also includes lighting and appliances, do not paste the whole bill into either field. Compare the portion attributable to space conditioning, and keep the same expected weather and household behavior across both choices. If those costs cannot be estimated credibly yet, use the calculator as a sensitivity test rather than a forecast.
Climate, permits and the decision to repair
Regional conditions affect both design and installation: a cold winter may change backup-heat sizing, while a hot and humid region places more emphasis on cooling and moisture control. Electricity and fuel rates also vary locally. Local authorities determine permit and inspection requirements, and electrical or refrigerant work may require licensed trades. Confirm the requirements with the jurisdiction and contractors rather than assuming the same rule applies everywhere in the United States.
If one option is to keep the current system, the decision may be repair versus replacement rather than heat pump versus new AC. Read the HVAC repair-versus-replacement guide before treating a complete replacement as inevitable. For a complete project budget, the HVAC replacement budgeting guide shows how to separate equipment from ducts, controls and permit work.
Primary sources
- U.S. Department of Energy, Heat Pump Systems
- ENERGY STAR, Air-Source Heat Pumps and Sizing
- ENERGY STAR, HVAC Quality Installation
Frequently asked questions
Should I include a furnace cost if my current furnace stays?
No new furnace installation cost should be entered if it stays. Enter zero for that line, but still include the furnace’s expected fuel use in annual AC-plus-heating operation.
Can a heat pump use my existing ducts?
A central ducted heat pump can use existing ducts when their condition, leakage and airflow meet the selected system’s needs. Ask the installer to inspect and document them.
Does the lower 10-year total mean the system is the best choice?
No. The modeled result omits maintenance, repairs, equipment life and comfort, and it depends on your inputs. Confirm sizing and cold-weather heating performance before choosing.
What if the heat pump needs backup heat?
Include the backup equipment and controls in the heat-pump installed quote and its expected use in annual operation. Compare that package with the full AC-plus-heating alternative.