There are several types of range hoods available, including wall-mounted, under-cabinet, island-mount, downdraft, and custom-built hoods. Wall-mounted and under-cabinet hoods are the most common and are installed against the wall or under a cabinet above the stove. Island-mount hoods are installed above a stove on an island in the middle of the kitchen. Downdraft hoods are installed on the cooktop surface and pull the air down and out through the floor. Custom-built hoods are designed and built to fit the unique layout and style of the kitchen.