Section 25C (formerly known as the Residential Energy Credits) provides a federal income tax credit covering 30-35% of qualified HVAC equipment installation costs for residential properties through December 31, 2034. This credit directly reduces tax liability and applies to heat pumps, air conditioners, furnaces, and boilers meeting specific efficiency standards installed in primary residences.
Equipment Specifications and Limits
Qualifying HVAC systems must meet ENERGY STAR Most Efficient or equivalent standards. Heat pumps must achieve HSPF2 ratings of 8.5 or higher and SEER2 ratings of 16 or higher. The maximum credit per year is $3,200 for heat pumps, $2,000 for air conditioners or furnaces, and $2,000 for boilers. Combined annual limits across all Section 25C improvements cannot exceed $3,200. Credits are nonrefundable but carry forward to future tax years.
Application and Benefits
Homeowners claim the credit on their federal tax returns (Form 5695) in the year equipment is installed. Installation must be performed by licensed contractors in most cases. The credit significantly reduces net installation costs, making premium efficient systems more accessible. Combined with state and utility rebates, homeowners can often recover 50-70% of total HVAC system replacement costs through various incentive programs.