This space-saving tower air purifier works two ways to freshen and clean the air in your home. First, its HEPA-type high-efficiency filter helps remove airborne particles such as smoke, dust, pollen, mold spores and pet dander. Then, to absorb and eliminate common odors, the filter is fortified with baking soda. The purifier is designed for a 180-square-foot room, or about 12 by 15 feet. The unit is less than three feet tall, which makes it easy to place in any room. Two control knobs let you dial in the performance you want; one adjusts the three power settings, and one turns the ionizer on or off. An indicator light lets you know when the filter needs changing. The outside of the unit can be cleaned with a damp cloth. The air inlet grill can be washed in hot soapy water, but it is not dishwasher-safe. Dry the filter completely before adding it back to the purifier. The top air outlet can be swept clean with a small, soft brush.