The Broan-NuTone RMDD3004 RangeMaster 30-inch Downdraft Exhaust System with Internal Blower combines a sensational appearance with high performance to exhaust your cooktop without the use of an overhead hood. The compact design is installed directly behind the cooktop and is specifically compatible with most conventional and commercial style cooktops. Stainless steel construction on all exposed surfaces provides a durable finish and an unforgettable professional look, plus the thin profile saves precious under-cabinet space. The chimney rises over 9-1/2 inches when activated, ideal for large pots and pans. The infinitely adjustable control is designed to provide convenient access to govern the blower speed for effective, quiet operation and the Heat Sentry adjusts the blower speed to high when excess heat is detected.