Modified Radial Tip.  Good induced draft fan. High efficiency with light to moderate dust loading (baghouse, I.D. fan with collector). Primarily used to handle fume exhaust and lighter particulate than the ORB, at higher efficiencies. Has Scroll-type housing of narrow design because of required high velocity discharge. High pressure characteristics. Power rises continually to free delivery. Used primarily for material-handling applications in industrial plants. Wheel is sometimes coated with special material. This design also used for high-pressure industrial requirements. 250-198,000 CFM. Static pressures tp 50". Temperatures to 1500 Fahrenheit.