HEPAH13

HEPA H13 is a European classification of high-efficiency particulate air filter defined by EN 1822. The H13 class requires a minimum filtration efficiency of 99.95% for the most penetrating particle size (MPPS), typically around 0.1-0.2 micrometres. This places H13 above H12 (99.5%) and below H14 (99.995%). The term HEPA is used broadly in many markets; H13 is one of the classes used to designate HEPA-level filtration in Europe.

Filter media often consists of glass fiber with a mat-like structure and a rigid frame. Efficiency is validated by standardized aerosol challenge, typically using PAO or modern alternatives, at defined face velocity; MPPS is used to assess worst-case performance. The testing follows EN 1822 procedures and defines acceptance criteria for production lots.

Applications include cleanrooms, pharmaceutical and medical facilities, laboratories, and hospital isolation rooms, as well as consumer air cleaners, HVAC systems, and some automotive cabin filters in Europe.

Performance depends on installation and maintenance. Proper sealing prevents bypass around the filter; performance degrades if the filter becomes overloaded or damaged. Replacement depends on manufacturer guidelines and monitoring of pressure drop.