ENERGY STAR, the blue label on efficient windows, appliances and buildings, is moving from the Environmental Protection Agency (EPA) to the Department of Energy (DOE). The two agencies finalized their transition plan on August 28, 2026. It follows an agreement they signed on March 3, 2026 that made DOE the lead agency.
What the plan says
- DOE takes over leading the program, and it will lead future updates to ENERGY STAR specifications.
- The ENERGY STAR trademark moves to DOE after a separate transfer plan, due by September 1, 2026, sets the date.
- The websites and tools move to DOE before July 2027. That includes the product finder and Portfolio Manager, the benchmarking tool many cities require large buildings to use.
- The whole move is meant to be done within 12 months of the plan.
- The plan notes that the EPA hasn't worked on updating specifications since early 2025. DOE will pick up the open issues.
What it means for you
- The label stays. ENERGY STAR windows, doors and skylights are still certified, and the agencies say they want as little disruption as possible for manufacturers and retailers.
- Window film has never carried ENERGY STAR. Film is rated by the National Fenestration Rating Council (NFRC), which also certifies the performance of ENERGY STAR windows. If you're choosing between new windows and film on your existing glass, compare the NFRC numbers: SHGC for heat from the sun, U-factor for heat loss and visible light transmittance.
- No federal tax credit either way. The home energy improvement credit ended for improvements placed in service after December 31, 2025. See our tax credit guide and check your utility for rebates.
- Building owners: ENERGY STAR scores from Portfolio Manager feed city benchmarking and building performance rules. Keep an eye out for DOE notices during the tool move.
What isn't confirmed yet
The transition plan doesn't give a trademark transfer date or say which specifications DOE will update first. We'll report changes that affect window ratings when they're announced.
Sources
- EPA and DOE: 2026 ENERGY STAR Program Transition Plan (finalized August 28, 2026)
- DOE: 2026 memorandum of agreement on the ENERGY STAR program
- Door & Window Market: EPA, DOE finalize Energy Star transition plan (September 1, 2026)
