Electrolux EL500AZ Oxygen Ultra Air Purifier Keep your house or office healthy with the Electrolux EL500AZ Oxygen Ultra Pet HEPA air purifier. It has been rated with a high clean air delivery rate of 260 and can cover a wide area of up to 400 square feet. It has five different fan speeds to handle air that requires heavy duty filtration. Energy Star has certified this purifier for its efficiency. The EL500AZ uses a multiple step filtration process to leave your clean, breathable and smelling great. It comes with 4 carbon pre filters, a years supply worth, to help eliminate negative odors. The True HEPA filter eliminates 99.97 percent of dust, debris, dirt and allergens all the way down to 0.3 micron level. The filter is also washable allowing multiple uses without having to purchase a replacement. The final stage of filtration uses Patented PlasmaWave Technology to eliminate smells and odor causing bacteria. There are plenty of features on Electrolux EL500AZ Oxygen Ultra Pet HEPA air purifier. The remote control allows you to operate from afar and the filter indicator light lets you know when it is time to replace the filter. There is an odor detector that will automatically adjust the fans to their proper speed and a sleep function to reduce noise and light levels so that you can breathe easy while you sleep.