HVAC systems that meet Department of Energy efficiency standards can reduce your federal income tax in 2024

The federal energy tax credit for HVAC systems in 2024 covers central air conditioners, heat pumps, and furnaces that meet specific efficiency ratings set by the Department of Energy. The credit is worth up to $2,000 for a heat pump installation and up to $600 for other may have access to systems, though the total credit across all home energy improvements in a single year cannot exceed $3,200. You claim this credit on your 2024 tax return using Form 5695, and you do not need to itemize deductions to use it.

The key requirement is that your HVAC equipment must carry a manufacturer's certification showing it meets or exceeds the efficiency threshold for its category. These thresholds change by region and by equipment type, so a system that qualifies in one state may not in another. You will need the manufacturer's documentation and proof of installation before you file.

Key Takeaways

  • Heat pumps may have access to for up to $2,000; central air conditioners and furnaces for up to $600 each, with a $3,200 annual cap across all home energy credits.
  • Your HVAC equipment must carry a Department of Energy certification label showing it meets the efficiency standard for your climate region.
  • The contractor or manufacturer must provide written documentation of the equipment model, serial number, and efficiency rating before you can claim the credit.
  • You claim the credit on Form 5695 when you file your 2024 tax return; the credit reduces your tax dollar-for-dollar, not your taxable income.
  • If your total home energy credits exceed $3,200 in one year, you can carry unused credit forward to future tax years.

Heat Pumps and the $2,000 Credit

Heat pumps — both air-source and ground-source — carry the highest credit amount at $2,000 per system. To may have access to, an air-source heat pump must have a Seasonal Energy Efficiency Ratio (SEER2) of at least 8.5 in the South, 8.0 in the Southwest, or 7.5 in other regions. A ground-source (geothermal) heat pump must have a Coefficient of Performance (COP) of at least 3.0.

The reason heat pumps receive a higher credit is that they both heat and cool your home using a single system, making them more efficient than separate furnaces and air conditioners. If you install a heat pump that replaces an existing furnace and air conditioner, you can only claim one $2,000 credit, not two separate credits.

Central Air Conditioners and Furnaces at $600 Each

A central air conditioner must have a SEER2 rating of at least 16 to may have access to for the $600 credit. A furnace must have an Annual Fuel Utilization Efficiency (AFUE) rating of at least 95%. These thresholds are the same across all U.S. regions, unlike heat pump standards which vary by climate.

If you replace both your furnace and air conditioner in the same year, you can claim $600 for each system, bringing your total HVAC credit to $1,200 before the $3,200 annual cap is applied. However, if you install a heat pump instead of replacing both separately, you receive only the $2,000 heat pump credit, not both the furnace and air conditioner credits.

How to Verify Your System Meets the Standard

The manufacturer's documentation is your proof. When the HVAC contractor installs your system, they should provide you with a certificate or specification sheet that lists the equipment model number, serial number, and efficiency rating (SEER2, AFUE, or COP depending on the equipment type). This document must show that the rating meets or exceeds the threshold for your region.

If you do not receive this documentation at installation, contact the contractor or the manufacturer directly and request it. The IRS does not require you to attach it to your tax return, but you must keep it in your records in case of an audit. The document should be dated and signed by the contractor or manufacturer representative.

You can also check the AHRI (Air-Conditioning, Heating, and Refrigeration Institute) directory online, which lists certified equipment by model number. If your system appears in that database with the required efficiency rating, that serves as verification.

The $3,200 Annual Cap and Carryforward

The $3,200 limit applies to all residential energy credits claimed in a single tax year, not just HVAC. If you also install insulation, a heat pump water heater, or solar panels in 2024, those credits count toward the same $3,200 ceiling. For example, if you claim a $2,000 heat pump credit and a $1,500 heat pump water heater credit, your total is $3,200 and you cannot claim any additional energy credits that year.

If your total may have access to credits exceed $3,200, you do not lose the excess. Instead, you carry it forward to 2025 and claim it on your 2025 tax return. There is no limit to how many years you can carry forward unused credit, so you will eventually use all of it.

Installation Requirements and Timing

The HVAC system must be installed in your primary residence — not a rental property, vacation home, or investment property. The installation must occur in 2024 for you to claim the credit on your 2024 return. If you sign a contract in 2024 but the contractor does not complete installation until 2025, you claim the credit on your 2025 return instead.

You do not need to own the home outright or have a mortgage. Homeowners, those with home equity loans, and even some renters with landlord permission can claim the credit if they paid for the installation themselves. If your landlord paid for the HVAC system, the landlord may be able to claim the credit, not you.

How to Claim the Credit on Your Tax Return

You claim the HVAC credit on Form 5695 (Residential Energy Credits), which you file with your 2024 Form 1040. The form asks for the type of equipment, the year installed, and the cost. You then transfer the credit amount to your Form 1040, where it reduces your tax liability dollar-for-dollar.

Unlike a deduction, which reduces your taxable income, a credit directly reduces the tax you owe. If you owe $3,500 in federal income tax and claim a $2,000 HVAC credit, your tax liability drops to $1,500. If the credit exceeds your tax liability, you do not receive a refund for the excess — it straightforward carries forward to the next year.

Frequently Asked Questions

Can I claim the credit if I installed my HVAC system before 2024?

No. The credit only applies to systems installed in 2024 or later. If you installed a may have access to system in 2023 or earlier, you cannot claim the 2024 credit. However, if you installed it in 2023, you may have been able to claim a credit on your 2023 return under the previous rules.

What if my HVAC system is Energy Star certified but does not meet the Department of Energy threshold?

Energy Star certification is not the same as meeting the federal tax credit threshold. Your system must specifically meet the SEER2, AFUE, or COP rating required by the Department of Energy for your region. Ask your contractor or check the manufacturer's documentation for the exact efficiency rating.

Can I claim the credit if I replaced my HVAC system myself instead of hiring a contractor?

Yes, as long as you have the manufacturer's certification showing the equipment meets the efficiency standard. You do not have to hire a professional installer, though most homeowners do. You still need the documentation of the equipment model, serial number, and efficiency rating.

Do I have to claim the credit in the year I install the system, or can I wait?

You must claim the credit on the tax return for the year the system was installed. You cannot defer it to a later year. However, if your total energy credits exceed $3,200, you can carry the unused portion forward to future years.

What happens if I sell my home after installing a may have access to HVAC system?

You can still claim the credit on your 2024 return even if you sell the home later. The credit is based on when the system was installed, not how long you own the home. The new owner cannot claim the same credit.