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Here at Homes2Clean® we only use vacuum cleaners fitted with high quality HEPA filtres.
HEPA is an acronym for "high efficiency particulate air". Basically HEPA is a type of filter that can trap and remove at least 99.97% of airborne particles that other vacuum cleaners would simply re-circulate back into the air of your home.
HEPA filters are composed of a mat of randomly arranged fibres. The fibres are typically composed of fiberglass and possess diameters between 0.5 and 2.0 micron. Key factors affecting function are fibre diameter, filter thickness, and face velocity. The air space between HEPA filter fibres is much greater than 0.3 μm. The common assumption that a HEPA filter acts like a sieve where particles smaller than the largest opening can pass through is incorrect.
Unlike membrane filters, where particles as wide as the largest opening or distance between fibres cannot pass in between them at all, HEPA filters are designed to target much smaller pollutants and particles. These particles are trapped (they stick to a fibre) through a combination of the following three mechanisms:
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