HEPA (High Efficiency Particulate Air) filters are one of the most common types of industrial filters in use. HEPA was originally developed as a breathing filter during the Manhattan project in the early 1940s to capture radioactive particles which protected the US soldiers and atomic scientists.
HEPA is used in countless applications to provide clean, particulate-free air. HEPA filters were originally intended to be used in lab and factory settings; however today, they are also commonly used in many consumer products including cars, vacuum cleaners, and air conditioning units.
The HEPA range consists of two classes: H13 (99.95% efficient) and H14 (99.995% efficient). These filters are normally associated with pollen, dust, and asbestos, but the higher class of filters (H14 which is our standard filter) has the potential to filter airborne aerosol transmission of viruses.
With the current pandemic, there has been lots of discussion surrounding HEPA filters and the fight against COVID 19, and, whilst there is no conclusive evidence to confirm this, a HEPA filter may help to slow the spread of the virus. The testing standards rate the filters based on a particulate size of 0.3um, and HEPA is actually very efficient at filtering particulate sizes of 0.1um (viruses) under the correct circumstances. An interesting study performed by NASA indicated that HEPA filters were able to capture sub-micron particulate down to 0.1 micron. (NASA report for reference). The COVID-19 virus is approximately 0.125 Micron or 125 nanometers in diameter. (Source: National Library of Medicine).
The HEPA filter itself is a water repellent, pleated glass fibre wool, bonded with acrylic latex to give a strong and consistent filter media. It is then mounted in an aluminium frame and the surrounding edges ‘potted’ to make an airtight seal to ensure no dirty air can escape. The filters have a long shelf life due to the method of construction, if stored correctly.
At Waysafe® we only use the H14 standard filter (produced to conform to EN 1822) in our SA, GP and AS range of cabinets to ensure the high standards of operator safety required in the Asbestos and Pharmaceutical industries. Click here to view our products.
Other, more higher grades of filtration are available from Waysafe®, such as ULPA but these are generally reserved for specialist applications such as Graphene. Please contact us for more information.
About Solotec Scientific
The Waysafe range of safety enclosures are manufactured by Solotec Scientific, delivering high-quality laboratory safety equipment to customers both within the UK and internationally. Solotec Scientific has been designing and manufacturing bench top safety enclosures since 1991.
Waysafe safety enclosures are used in a variety of research and hospital applications within a number of industries including the food, asbestos, chemical, life sciences and pharmaceutical sectors. Waysafe also has a wide stock of replacement filters, motors, and accessories for a range of models, all ready for immediate dispatch, which can be ordered from our online store.
The team at Waysafe is always available to discuss your specific requirements and is committed to providing the best in bench-top safety enclosures.
If you would like to find out more about our range of safety enclosures, contact a member of the team on 0161 339 6187.