The primary purpose of filtration in the air sterilizer unit, is to increase the efficiency of the ultraviolet lamps. Ultraviolet lamps are surface treatment to the air stream and if particles travel through this air stream, microbes can hide from the U.V. exposure and therefore inoculate your tank. The greater the filtration process, the more efficient your U.V. exposure to the air stream becomes and you will have fewer problems with microbes entering your tank.
Most sterilizers utilize Electrostatic Filters as the pre-filter to a HEPA or sometimes they stand alone. The Electrostatic Filter is made from a polyethylene plastic that exhibits the property of generating appreciable electrostatic charges under the influence of an air stream. Since airborne dust particles are by nature either negative or positive, they are strongly attracted and firmly held by the opposite charges on the polyethylene media. Given the size and nature of the microorganisms that can inoculate a tank, the Electrostatic Filter by itself is not efficient enough to stop them from entering. Electrostatic Filters primarily stop the “boulders” in the air stream. HEPA Filters are the best for removing most of the air borne microorganisms and dirt particles. Electrostatic Filters will greatly extend the life of the more expensive HEPA Filter when used as the pre-filter. Most HEPA filters, with proper design, can filter down to .3 microns. This will eliminate the majority of problems that can create harm to your primary ingredient. We offer all sizes of the Electrostatic Filters and HEPA Filters.