The HEPA Filtration Specification. The best HEPA filters are certified to meet stringent standards, such as the European Norm 1822 (also referred to as EN 1822) for filtration performance, and are identified with a certification number. Certified HEPA filters are also known as True or Absolute HEPA filters.
Most vacuums with HEPA filters are usually not designed to be leak-proof.. cleaner certified with the most stringent filter test standard â€“ the EN1822 test norm.
Vacuum cleaners. Thanks to the HEPA HEPA 13 lifetime filter, even the smallest particles such as fine dust and. by the medical organization, â€œAllergy UKâ€, and certified as suitable for those with allergies.. 2 According to EN 1822/ 2011.