Broan-Nutone Open Mesh Aluminum Grease Filter (A0) For Single Filter Range Hood Models The Hpfa Broan? Range Hood Filters Are Made From The Highest Quality Materials To Provide The Longest Life Possible And Keep Your Range Hood Operating At Peak Performance. The Hpfa Aluminum Filter Captures Grease And Particulates Generated During Cooking. Large Dishwasher-Safe, Single Open-Mesh Filter Provides Efficient Grease Removal.