HEPA filters are a type of air filter that can capture a wide range of particles, from dust and pollen to bacteria and viruses. They come in a range of grades, from H10 to H14, with higher grades providing better performance. Filters with a grade of H10 to H12 are known as true HEPA filters, and they can capture up to 99.97% of particles that measure just 0.3 microns from the air. H13 and H14 filters are referred to as medical grade HEPA filters, and they can filter out 99.95% and 99.995% of particles down to 0.3 microns, respectively.
Most HEPA filters can handle air flow at 250 feet per minute (FPM) without too much pressure drop. For a vacuum cleaner's HEPA filter to be effective, it must be designed so that all air drawn into the machine is expelled through the filter and no air escapes through it. HEPA filters have no minimum efficiency and far exceed the MERV rating system, which is why they are commonly used in clean rooms that require the highest levels of air quality, such as in the production of LCD screens. When selecting an adhesive for manufacturing a HEPA filter, it is important to choose one that is safe to use and does not interfere with the operation of the filter. When comparing different air purifiers from different manufacturers, it is essential to consider the grade of HEPA filter being used. In 1998, European Standards (EN) developed the first set of standards for a filter classification system for HEPA filters based on the filter filtration process. This system is perfect for HEPA filters and can attach a variety of internal components to the filter. When discussing HEPA filters, it is important to distinguish between true HEPA filters and HEPA-type, HEPA-style, or “HEPA-like” filters.
All HEPA filter manufacturers check the efficiency, integrity, and performance of their filters. True HEPA filters are classified as H10 to H12, while medical grade HEPA filters are classified as H13. True HEPA filters are more advanced than their counterparts, as they capture up to 99.97% of particles that measure just 0.3 microns from the air. When selecting an air purifier or vacuum cleaner with a HEPA filter, it is important to consider the grade of filter being used and make sure that all air drawn into the machine is expelled through the filter and no air escapes through it. Additionally, when selecting an adhesive for manufacturing a HEPA filter, it is important to choose one that is safe to use and does not interfere with the operation of the filter.