United Air Specialists (UAS), a manufacturer of air cleaning and indoor air quality equipment offers the VisionAir™ indoor air quality system. VisionAir is an effective and user-friendly solution to indoor air pollution from smoke, aerosol, dust, germs and more. Filters remove 99.97 % of indoor irritants and pollution while a carbon filter removes unpleasant odors. Available in two models for wall, ceiling or stand mounting. United Air Specialists.