The Multi-Tech Air Purifier XJ-3000C - For Each Technology The Multi-Tech Air Purifier XJ-3000C uses stainless steel ionizer pins, which are more durable than other ionizers. Besides durability, these ionizing pins produce a high negative ion output. The ionizer pins are located just inside the air outlet just above the fan, for maximum circulation throughout the room. The Hepa air filter cartridge is preceded by an activated carbon air filter and anti-bacterial pre-filter. The Multi-Tech uses a "CCFL" (Cold Cathode) ultraviolet lamp, which lasts longer than other UV lamps. This powerful UV lamp is placed just behind the Hepa air filter, to destroy the bacteria captured by the Hepa air filter, preventing the reproduction of bacteria and lengthening the life of the filter.The most important characteristic of the Multi-Tech ozone option is that it can be turned off, in case ozone is not desired. It can also be adjusted to High, Medium, or Low, to produce the right amount for the situation or environment. The 3-speed fan is virtually silent on the low setting, for quiet and non-disturbing air purification. The fan can be turned to a higher setting for increased effectiveness. The Multi-Tech offers cost savings in every aspect. This air purifier uses only 40 watts of power, saving as much as hundreds of dollars in electricity consumption each year compared to other electronic air filters. Heaven Fresh Multi-Tech XJ-3000c covers up to 500 Sq.ft.