While the application of tolerances is allowed in both sections if needed, the use of tolerances can increase the products’ risk of failure in verification testing. EPA recommends that ENERGY STAR product brand owners design products to exceed the minimum specification requirements. The 3% tolerance for light output measurements is applied to each unit’s measured value to allow for consistent and repeatable application by the certification body determining compliance with the requirement. The 3% tolerance may be applied to initial flux measurements for efficacy and light output evaluation and to luminous flux measurements at points prescribed by lumen maintenance testing, such as 1000-hr, 3000-hr and 6000-hr readings, but may not be combined with any additional tolerances or adjusted for measurement uncertainty.
energy efficient products
ENERGY STAR products are independently certified to save energy without sacrificing features or functionality. Saving energy helps prevent climate change. Look for the ENERGY STAR label to save money on your energy bills and help protect our environment.
Find ENERGY STAR Products Energy Savings at Homes Take the Pledge Learn about Climate Change
ENERGY SAVINGSat home
energy savings at home
Improving your home's energy efficiency with ENERGY STAR can help to lower high energy bills, improve comfort and reduce greenhouse gas emissions. Learn about the many ways to save in your home and track your progress with "My ENERGY STAR" - your new dashboard to savings.
Start Saving Now Take the Pledge Home Assessment Tools Seal and Insulate Your Home Learn about ENERGY STAR Products Learn about Home Performance with ENERGY STAR
ENERGY EFFICIENTnew homes
energy efficient new homes
A new home that has earned the ENERGY STAR label has undergone a process of inspections, testing, and verification to meet strict requirements set by the US EPA. ENERGY STAR certified homes use 15-30% less energy than typical new homes while delivering better comfort, quality, and durability.
Find Builders and Incentives Home Features and Benefits Homeowner Testimonials Resources for Partners
ENERGY STRATEGIES FORbuildings & plants