HEPA Filters are used in hospitals because they are considered the best filters on the market today. Originally developed by the Atomic Energy Commission during World War II to remove radioactive dust, which was invisible but health hazardous, from manufacturing plant exhausts. In order to meet required standards a filter must collection 99.97% of a specific particulate that measures .30 microns in order to receive the HEPA filter designation. The HEPA Filters sold by Vito Services capture 100% of all particulate sizes ranging from >100 microns down to 0.01 microns.
Standard HEPA media is made of very thin glass fibers. They are made into paper much the same way as cellulose or wood fibers are used to make paper. In texture, it is very much like blotting paper and air cannot pass easily through this dense mass. A large area of paper must be used to permit the filtration of a large volume of air. The get the large area it is pleated (hence the term “extended surface”).
The universal use of HEPA filtration has been hindered because the high pressure needed to force air through a HEPA Filter is unavailable from your forced air furnace fan. The power requirement is overcome by the separate motor in a HEPA 500 unit where it is positioned parallel to, instead of across, the airstream. Polluted air is directed through the filter on a multiple pass basis making clean air available throughout the building. Combined with a pre-filter to capture larger particles, the Indoor Air Quality (IAQ) products installed by Vito Services are designed to maintain their performance rating for up to two years before replacing the HEPA filter. It is recommended that you clean the pre-filter monthly and change it and the carbon filter twice yearly.
The HEPA Filters installed by Vito Services have been developed to work with any home heating/cooling system and – when used in conjunction with a Polarized Media Air Cleaner – engineered to capture the visible (above 40 microns) and invisible (40 through 0.01 microns) particulate found in indoor air. Vito Services installs HEPA Filters on the return-side air duct so, because there is zero pressure drop, it will not interfere with the ability of the HVAC system blower to deliver clean, safe, healthy air to the building.