HEPA Filters Jaime Graymead 5th January 2017 HEPA Filters HEPA Filters H10 to H14 to EN1822 ULPA Filters U15-16 Cassette Filters H10 to H14 to EN779 Laminar Flow Cabinet HEPA Filters are installed where the highest level of air filtration is required in applications suxh as clean rooms, operating theatres, research facilities, the electronics industries, nuclear and pharmaceutical industries. The filtration medium is provided by microfine glass fibres formed into a paper-like surface, supplied in various grades depending upon filtration efficiency required. The filter paper is formed into a close pleated package to provide a large surface area. Grade Overall Efficiency Local Value Efficiency Suggested for ISO 14644 : 1999 H11 95% – H12 99.5% – ISO Class 8 H13 99.95% 99.75% ISO Class 6 H14 99.995% 99.975% ISO Class 5 U15 99.9995% 99.9975% ISO Class 4 HEPA Styles Airclean have been manufcaturing Deep Pleat style air filters for over 30 years. Deep Pleat HEPAs are now considered as the “Old Fasioned” style of HEPA filter in the industry, however there is still market demand for this product due to its unique capabilities. Mini Pleat and Wedge HEPA Filters are the more modern style of HEPA filters and are available in all HEPA Filter Grades. HEPA cassette filters are a complete disposable unit including a rear mounted spigot offering an economical alternative to a HEPA Terminal Housing. Lead Time HEPA filters are generally available on a 2-3 week lead time.