The W5 will have a reusable, removable standard screen filter that we recommend cleaning once per month. The filter can be easily removed with the help of a pull-tab from the bottom of the front faceplate. This filter is used to remove large dust particles and prevent the clogging of the evaporator coils, but it is not designed to improve room air quality with regard to pollen, dust, or smoke. That type of filter requires a lot more suction ie. a lot more energy usage.