Back pack vacuums...
require some training to use properly. A curved back and forth stroke is most efficient and keeps the tool FLAT to the floor which is required for effective cleaning. Tools with brushes are available
Most commercial carpet is low pile, glued down over concrete. Back packs were designed for this type of cleaning. Revolving brushes, especially with beater bars literally pound the vacuums to death in this type of application.
Taking into account the required belt changes which are too infrequently done, and the ability of the backpack to get under furniture, it is easy to understand their popularity with maintenance personnel and supervisors. Properly used, a back pack vacuum can clean in excess of 10,000 sq ft/hr, including edges, with less operator fatigue and fewer orthopedic injuries. For stadiums, theaters, and open reception areas with plentiful seating a back pack is the unit of choice.
