SQX fans can be used in square ducts as clean air boosters in both supply and exhaust systems where the installation of conventional blowers is impractical, the SQX is an excellent choice due its compact design. As an integral part of a ventilation system layout, SQX fans can be installed either horizontally, vertically or at any angle determined by the duct work. Direct-drive motors are isolated from the airstream. Belt drive motors are mounted on the outside housing and can be positioned at any angle to avoid existing building obstructions. SQX fans feature durable galvanized steel construction (aluminum optional). The centrifugal wheels are aluminum, non-overloading, backwardly inclined, robotically welded, and dynamically balanced.