High-efficiency clothes dryers are commonly clothes dryers that have earned the ENERGY STAR Qualified Appliance label. Ultra-efficient clothes dryers are those that meet ENERGY STAR’s “Most Efficient” designation requirements. For the most energy savings, consider ENERGY STAR certified heat pump dryers that can save 20-60% more than conventional clothes dryers. This can add up to significant savings for consumers with high clothes dryer usage and high electricity rates.