Compare the estimated cost of keeping an older air conditioner with replacing it with a newer, more efficient system. See annual cooling savings, ownership cost, replacement payback and long-term cost difference.
Compare Old AC vs New ACIf you need a replacement-price estimate first, use our HVAC replacement cost calculator . If the decision is being driven by a current repair, compare both paths with the HVAC repair vs replace calculator .
Use realistic cooling expenses, efficiency ratings and replacement costs for the most useful comparison.
This comparison assumes both systems deliver a similar cooling load and that the old AC remains operational throughout the selected period. It does not predict future failures, electricity rates, financing, resale value or the exact remaining life of the existing system.
Estimated operating and repair cost over the comparison period.
Replacement investment plus estimated energy and maintenance costs.
Request HVAC help below if you want to provide your location and details about the existing air conditioner.
A higher-efficiency air conditioner can require less electricity for a similar seasonal cooling load. For a more focused efficiency comparison, use the SEER2 savings calculator .
Keeping an older AC can involve repair expense beyond electricity use. Estimate a current repair separately with the AC repair cost calculator before deciding what annual repair allowance is realistic.
Replacement economics depend heavily on the installed cost of the new equipment. Compare your input with our guide to AC replacement cost in Texas .
A replacement that does not recover its cost quickly through energy savings can still have different long-term economics when repair expense and reliability are considered.
If you do not know how much your air conditioner contributes to the electricity bill, use the AC running cost calculator to estimate cooling expense from capacity, efficiency, runtime and electricity rate.
A high utility bill is not automatically proof that the AC needs replacement. Airflow, thermostat settings, weather, ducts and equipment faults can also matter. Review common causes of a high HVAC electric bill before assuming efficiency is the only issue.
System age, repair history, comfort, reliability and the size of the current repair can all change the comparison. Review our detailed AC repair vs replacement guide alongside the calculator.
If replacement remains the likely path, review the broader AC replacement process rather than choosing equipment only from the efficiency number.
DOE provides residential central air-conditioner efficiency and lifecycle cost information for comparing equipment purchases. Review DOE central AC efficiency guidance .
ENERGY STAR provides consumer guidance on evaluating older heating and cooling equipment, including repairs, comfort and energy use. Review ENERGY STAR replacement guidance .
Savings depend on the difference in efficiency, actual cooling load, runtime and electricity price. The calculator estimates the energy-cost difference using your current cooling expense as the baseline.
Not necessarily. Higher efficiency can reduce energy use, but the equipment and installation price may also be higher. Total ownership cost should include both upfront and operating expenses.
They can be useful when the old system has a documented repair history. Avoid assuming large future repair costs without a reasonable basis.
Only approximately. Legacy SEER and SEER2 use different test procedures, so a simple numerical ratio should be treated as a planning estimate rather than an exact engineering conversion.
No. Efficiency can reduce energy required for a similar cooling load, but weather, thermostat settings, ducts, system sizing, installation and utility rates also affect electricity bills.
Simple payback estimates how long annual energy and ownership-cost savings would take to equal the net replacement investment.
Age is only one factor. Equipment condition, repair frequency, comfort, energy use and replacement cost can also affect the decision.
No. The calculator does not predict equipment failure or remaining service life. It compares financial scenarios using the values you enter.
Request HVAC help if you want to provide your Texas location and information about the existing air conditioner and replacement needs.