The Air Tube series is the ultimate solution for clean and portable air for small spaces like individual rooms and offices. This is a variable speed unit and there are 3 options available; a standard AirTube, an AirTube Junior and the AirTube Supreme. Each unit is fitted with a HEPA filter and activated MAC-B? carbon; the standard unit has 7 pounds, the Junior has 4 pounds and the Supreme has 10 pounds. The units are lightweight and the filter combination will be effective with air quality concerns like airborne dust, chemicals, gasses, odors and VOC?s. The AirTube is ideal for operation in areas of up to 400 square feet.