These provide ventilation of exhaust fumes in automotive repair facilities, garages, fire stations, and shops. They can be either ceiling or wall mounted and incorporate a heavy duty frame built. They can be connected to a central exhaust system or direct fan and incorporate an easy to remove panel which allows access to the main drum that includes internal ducting making it ready to go. Refer to our NL4510, NL6167, NL6167H, etc for the hose.