Filter sets for vacuum cleaners

Filter sets

— sets of several filters designed for simultaneous installation in a vacuum cleaner. Most often, such a kit includes a HEPA filter (see the relevant paragraph), supplemented by a pre-engine filter and/or a foam element for pre-cleaning. Anyway, filter sets are usually designed for specific vacuum cleaners (or specific lines from one manufacturer); buying a set can be not only more convenient, but also cheaper than buying filters separately.