Frame filters are typically used in domestic kitchen hoods. Heavier-than-air grease particles strike and adhere to the layers of mesh inside the filters. Captured grease cannot therefore drip down on to food and equipment beneath. Frame filters are made from aluminum or stainless-steel frames containing up to 12 layers of mesh. Handles facilitate installation in and removal from the hood. Frame filters can also be used as dust filters in industrial processes in general. They are safe to use, can be regenerated, and are easy to wash in a dishwasher.