What is a HEPA air cleaner?
Easy explanation: a Hepa air cleaner is an air cleaner with a HEPA filter as the main filter. But what is a HEPA filter? HEPA was originally developed for space travel, but is now also used in air cleaners to filter pollution from the indoor air. HEPA literally means: High Efficiency Particulate Air. HEPA are air filters that retain between a minimum of 85% and a maximum of 99.9999995% of all dust (most penetrating particle size) of 0.1 micrometer (µm), depending on the specific filter type. A HEPA filter is specified in European Union European Standard 1822: 2019 and can be found in several classifications:
|E10||> 85 %||—|
|E11||> 95 %||—|
|E12||> 99,5 %||—|
|H13||> 99,95 %||> 99,75 %|
|H14||> 99,995 %||> 99,975 %|
|U15||> 99,9995 %||> 99,9975 %|
|U16||> 99,99995 %||> 99,99975 %|
|U17||> 99,999995 %||> 99,9999 %|
Only if a filter fits within the above class can it be called a HEPA filter. An H13 or H14 filter is usually recommended when purchasing dust extraction with a HEPA filter and this is also what Euromate offers in its solutions. This classification indicates a filtration of 99.75% and 99.97%, respectively, so all dust particles larger than 0.1 micrometer (µm) are stopped.
How does a HEPA air cleaner work?
A HEPA air cleaner contains a fan that keeps the air in motion. This provides a suction effect (the air is attracted). The air can be cleaned by placing a HEPA filter. As already mentioned above, the HEPA filter has a number of classifications. With this, it is known up to which particle size is removed.
Practice: which particles can a HEPA air cleaner filter and what not?
A HEPA air cleaner removes particles from the air with an effectiveness of 99.97% and which are as small as 0.1 micron. How small is 1 micron? One micron is one millionth of a meter (so very small). A hair is about 70 microns thick and just visible with the naked. A HEPA air cleaner removes a wide range of contaminants from the air: such as coarse dust, fine dust, smoke components, fungi, viruses, bacteria, aerosols, pollen, dander and allergens from the dust mites from the air.
The indoor air in the medical sector, care, but also in schools, companies, etc. is polluted with all kinds of contaminants that can be filtered with a HEPA filter. This makes the air clean again. Air purification is also really necessary because our nose, mouth and throat simply cannot catch all the contaminants and thus enter the lungs. There they cause all kinds of complaints: asthma, breathing problems and “sick building syndrome”. A HEPA air cleaner ensures that all these complaints are drastically reduced or even resolved!
A HEPA air cleaner must be periodically maintained to continue to guarantee proper operation. HEPA filter becomes dirtier and dirtier due to (intensive) use. So there will come a time when it needs to be replaced. The costs are low, but it is really necessary to be able to continue to guarantee clean air. HEPA filters are disposed of as waste after use and are therefore not reusable, unlike an air cleaner with ionizer.
Can a HEPA air cleaner filter the COVID-19 virus?
COVID-19 virus particles will always be surrounded by a cocoon of breathing fluid (aerosols). The total diameter of these aerosols including the virus particle depends on the air humidity, but cannot be smaller than the dimension of COVID-19 virus particles. These have a size of 0.12 µm. So there is an aerosol liquid around this. Based on the filtering efficiency and the aerosol sizes that may contain the COVID-19 virus, it is concluded that a HEPA H13 will trap this virus. This reduces the aerosol concentration that may contain the virus in a room during the operation of the system.
Euromate supplies HEPA H13 filters in its VisionAir Blue Line air cleaners. The MicrobeFree Global filter package has been tested by the Finnish research institute VTT. They come to the conclusion that the COVID-19 virus is filtered out of the air with high efficiency. Also research institute TNO concludes this based on the data. More information can be found on the special MicrobeFree page.