Chicago's IRT fan was designed specifically for demanding heavy-duty applications, including hot gasses and fumes, induced draft, process exhaust and light concentrations of solids in a variety of industries. The IRT combines the advantages of the radial and backward inclined industrial fan blades and replaces the traditional light-duty exhauster with a more rugged, longer life span. It will handle moderate to high pressures and temperatures and has a static efficiency capability of 76%.