Radial Tipped Blade.  High efficiency induced draft fan. High efficiency with light to moderate dust loading (bag house, I.D. Fan with collector). Primarily used to handle fume exhaust and lighter particulate than the ORB, at higher efficiencies. Larger volume capability and higher efficiency than Type P. Used primarily for dust collection applications in industrial plants. Wheel is sometimes constructed from alloy materials. Up to 250,000 CFM. Static pressures up to 40". Temperatures to 1500 Fahrenheit.  For higher performance requirements, please consult the factory.