This negative ion generator type of air cleaner needs only a filter to make it into one of the products we see on TV for over a hundred bux. The assembly operates on 115 VAC The solid state module generates a high voltage ion stream that attracts airborne particles by charging the air, the charged particles will stick to whatever they come in contact with and cling due to the static charge;. a simple cloth filter will trap pollen, smoke, and other pollution as it is drawn in by the fan. The white part in the photo is the 'ion generator', the fan recirculates the charged particles around the room and draws the dust, virus etc that have become charged and trap them in the filter. Save big by making your own custom installation. One of these could be added to the house HVAC system... (24U001)