The filters that fit with the standard of HEPA filters have filtering capability far superior to a conventional filter. In general, they must be able to capture 99.97% of particles passing through them that are larger than 0.3 micron size. These filters are used in many industries, from medical, vehicles, avionics, and of course at home.
HEPA standard indicates a type of filter that can capture a larger amount of very small particles that other filters may not be able to. In other vacuums that do not have these HEPA filters, small particles are not captured by the filter and are absorbed by the turbine. If you use vacuum cleaners without HEPA filter, you will only be working without being efficient and absorbing and removing all dust. For this many times when we aspire to a have cheap or without this type of vacuum cleaner filter, we see against the light that comes very fine dust.
Vacuums with HEPA filters is beneficial to your health and particularly for those suffering from asthma or allergies, because I we said, they are able to capture very small particles which are those that trigger such ailments and discomfort.
HEPA vacuum cleaners are typically more expensive than non-HEPA because manufacturing process is more expensive of HEPA filters and they are stronger to force air through a filter that is very dense.
There are different types of HEPA filters for home which may cause confusion, so lest see what they are to avoid confusion.
For a HEPA vacuum to be efficient, the cleaner must be designed in a way that all air passing through it, in turn passes through the filter without absolutely no escape from the sides. When a vacuum cleaner meets these requirements, usually they indicate that it is a sealed HEPA or sometimes also indicates True HEPA. These filters usually have a serial number, in addition to the test results, show that gets at least to capture 99.97% of particles smaller than 0.3 microns that pass through them. This type of vacuum cleaner is often used in industrial environments, but not at home. They are very expensive and sophisticated.
If a vacuum cleaner only indicates HEPA, it means containing a filter with these characteristics, but it is not guaranteed that all air will pass through absorbing all particles. In general, this type of vacuum captures between 85% and 90% of particles passing through it. These are the usual filters in an advanced household vacuum cleaner.
Surely many of you may have a robot vacuum cleaner including HEPA filters. Well, before starting to explain what a HEPA filter is, we must be clear about what a normal air filter is and how it works.
An air cleaner is a device that removes solid particles such as dust, pollen and airborne bacteria. They are useful and important in places where good air quality is needed such as ventilation systems, internal combustion engines, compressors, gas turbines, vacuum cleaners. There are different types of filters from foam, paper folding, cross fiber glass, polyester, polypropylene and a synthetic fiber called microfibers.
What is a HEPA filter?
HEPA is an acronym whose initials signify as High Efficiency Particulate Air. It consists of a mesh of glass fibers between 0.5 and 2 microns in diameter which are randomly arranged.
How does it work?
The HEPA filter removes numerous hurtful atoms such as mold spores, mites, dust, pet fur and many other exasperating allergens from air. A HEPA filter does it through a combination of three actions which are as follows;
Thus, thanks to these 3 mechanisms, when particles pass through the HEPA filter, they are trapped in it for the reason that they remain attached to rub against the mesh of fibers arranged at random that make up the filter and so they do not go outside.
HEPA filters carry a numbering and it is a standardized by industry indicators ranging from 10 to 14. It is based on the amount of particles down to 0.1 microns which are rejected per liter of air. So, we will find the following;
- HEPA H14: 5 particles per liter of air (the highest level of cleanliness)
- HEPA H13: 50 particles per liter of air
- HEPA H12: 500 particles per liter of air
- HEPA H11: 5000 particles per liter of air
- HEPA H10: 15000 particles per liter of air
They ensure the effectiveness of the suction process, so that dust particles and other allergens do not return to your ambience in the house because they are retained. HEPA filters prevent the spread of bacteria and viruses through the air and are very important to prevent diseases. The HEPA air filters are highly recommended if there are allergic people or the ones with respiratory problems at home. HEPA filtration systems typically incorporate a high energy ultraviolet light to kill any bacteria and viruses living being trapped in the filter.