Energy Star is a certification program identifying energy-efficient products, buildings, and industrial facilities. Originating as a US Environmental Protection Agency program, Energy Star is now administered in Canada by Natural Resources Canada. Products earning the Energy Star label meet strict efficiency criteria—typically using 10-50% less energy than standard products while delivering equivalent performance. The familiar blue star logo appears on appliances, electronics, lighting, heating/cooling equipment, and building materials. Energy Star certified buildings and homes meet whole-building efficiency standards. The program helps consumers identify efficient products without technical expertise, reducing energy costs and environmental impact. Many utility rebate programs and government purchasing policies reference Energy Star certification. Energy Star is one of several efficiency certifications; others include EnerGuide ratings (mandatory in Canada) and various green building certifications.