What type of elevators are specifically designed without a machine room?

The concept of machine-room-less (MRL) elevators focuses on the innovative design that eliminates the need for a separate machine room, which is traditionally found in standard elevator systems. This type of elevator integrates the machinery directly within the elevator shaft, thus allowing for a more streamlined and compact installation.

This design not only saves valuable space in buildings but also simplifies construction and maintenance. MRL elevators are often more energy-efficient and can offer greater design flexibility in modern architecture since they require less vertical space for the mechanical components compared to traditional elevators that require a dedicated machine room above their shafts.

While cable-driven elevators, hydraulic elevators, and pneumatic elevators each serve specific purposes and have their own distinct features, they typically do not possess the MRL characteristics that allow for the removal of the machine room.