The Broan BPPF30 Non-Ducted Filters (2-pack) are designed for Broan's 30-inch Evolution 1, 2, and 3 series range hoods. Broan's Clean Sense charcoal filters change color when it is time to replace them for optimum odor removal. These filters are made from the highest quality materials to provide the longest life possible and keep your range hood operating at peak performance.