The Energy Star program was created by the United States Department of Energy to help manufacturers create products that use less energy.
In order for a product to receive an Energy Star seal of approval, it has to meet stringent requirements from Department of Energy.
Typically, Energy Star rated air purifiers can save up to $35 a year in energy costs compared to non-Energy Star rated units.
For more information on the Energy Star program and how air purifiers qualify, click here