What is the difference between a HEPA filter and HEPA type filtration?
– A HEPA filter must be capable of capturing 99.97% of all particles, in order to be certified as a HEPA filter. – A true HEPA filter is tested and marked with a certification number which gives the user assurance that the HEPA specification efficiency is actually being achieved by filter. – A HEPA type filter or paper bag uses similar construction or fibers to that used in a true HEPA filter. While being a significant improvement, it may not have a completely sealed filtration system so there is no guarantee that the stringent HEPA specification will be met. – A HEPA filter is only fully effective when used on a ‘sealed system’ vacuum. Simplicity and Miele offer sealed system HEPA filter vacuums.
