Certified dryers and combination all-in-one washer-dryers that meet all ENERGY STAR requirements as listed in the Version 1.1 ENERGY STAR Program Requirements for Clothes Dryers that are effective as of January 1, 2015. Combination all-in-one washer-dryers also meet the Version 8.1 ENERGY STAR Program Requirements for Clothes Washers that are effective as of February 5, 2018. A detailed listing of key efficiency criteria are available at: https://www.energystar.gov/products/appliances/clothes_dryers/key_product_criteria