Industrial Maid's goal is to provide the best in customer value and service. Our units are environmentally friendly on two levels. Our cabinets are made of recycled plastic which means each standard Industrial Maid air filter unit manufactured means 350 milk jugs won't be going to a local landfill. And customers are delighted at the energy savings they notice by not venting expensive heated or cooled air to the outside. The air is cleaned and recirculated into the same space.