HEPA Type
A type of filter or paper bag which uses similar construction or fibers to that used in a true HEPA filter. Some are thick filter pads which actually meet the stringent HEPA filtration specification. While being a significant improvement over regular filters, the vacuum that uses it may not have a completely sealed filtration system so there is no guarantee that the stringent HEPA specification will be met by it. Manufacturers who use Certified HEPA filters tend to consider any non-certified HEPA filter to be a “HEPA Type” filter.