Machine Roomless Elevator

Machine-Room-Less (MRL) Elevator means an elevator designed so that the driving machine for the unit is located in the hoistway rather than in a separate elevator machine room.Machine-room-less elevators utilize a gearless traction machine located in the hoistway. The use of a counterweight assists the machine in turning the elevator sheave, which moves the cab through the hoistway.Modern traditional hydraulic elevators may now utilize a set of twin-post, above-ground jacks. In recent years, elevator companies have started to offer a hydraulic elevator with the equipment housed within the elevator shaft; this is known as a Hydraulic MRL, or HMRL.