Elevator technology
Machine Roomless Elevator
A machine-room-less lift puts the drive inside the hoistway, freeing building space and changing how the shaft is planned.
7 min read · Updated November 2026
Reference photography is representative. Final system selection is confirmed after a site survey.
Justin Elevators engineering desk · Bengaluru
How it works
Machine Room-Less (MRL) elevators have revolutionized building design by eliminating the traditional machine room. All mechanical and electrical components are housed within the hoistway itself, typically at the top. This innovation saves valuable building space, reduces construction costs, and provides architects with greater design freedom. MRL elevators are the fastest-growing segment of the elevator market, particularly for low to mid-rise buildings.
01
In a conventional traction lift, the machine and controller sit in a rooftop machine room. An MRL lift uses a compact gearless machine mounted inside the hoistway, usually at the top, with a small controller cabinet nearby.
The machine is small enough to fit within the hoistway envelope because permanent-magnet motors provide high torque in a compact package. The result is more usable building space and a simpler rooftop.
02
Removing the machine room can free a meaningful area of the building and reduce structural work on the roof. It also gives architects more freedom for rooftop amenities, solar panels or a cleaner facade.
The trade-off is that the hoistway must provide enough overhead space and safe access for service. The machine is above the car, so maintenance procedures and inspection controls must be planned carefully.
03
Most modern MRL lifts are gearless traction systems using steel ropes or coated belts. Hydraulic MRL systems also exist for low-rise applications, but they still need a power unit and oil management.
The choice between rope and belt affects sheave size, headroom, monitoring and maintenance. The building's height, duty and local service support should guide the decision.
04
An MRL lift is not maintenance-free. The machine, brake, governor, ropes or belts and controller still need inspection. Safe access to the hoistway machine is essential and should be designed, not improvised.
Ask for the maintenance procedure, machine access method and emergency rescue plan. Confirm that the service technician can reach the machine safely without disturbing the car or exposing building users to risk.
Inside the system
A mrl elevator is more than a motor and a car. These are the assemblies that determine safety, ride quality and service life.
It saves 25% of total elevator equipment area and reduces 40% of space occupation compared to traditional machine-room elevators.
01
A low-profile PMSM motor mounted in the hoistway. Provides high torque in a very compact package.
02
Small-diameter sheave mounted directly on the motor shaft. Usually 110-200mm diameter.
03
Structural steel beams at the top of the hoistway that support the machine weight and dynamic loads.
04
Steel wire ropes or coated steel belts connecting the car and counterweight.
05
Compact control panel typically located in a small electrical closet or mounted on the hoistway wall.
06
Standard counterweight assembly but often more compact than in machine-room systems.
07
Mounted within the hoistway, usually on the guide rail at the top. Activates safety gear in overspeed conditions.
08
Standard elevator car with guide shoes running on T-shaped steel guide rails.
Where it fits
Safety
Advantages
Trade-offs
Before you order
Questions
The answers below are general guidance. Your building, local code and intended use determine the final specification.
No. MRL describes where the machine is located; gearless describes the machine type. Most modern MRL lifts use gearless machines, but the terms are not interchangeable.
It does not need a conventional machine room. It still needs space for a controller and safe access to the machine inside the hoistway.
They often are, because they use compact gearless drives. The actual energy use depends on the building, traffic, standby power and controller. Compare full-life energy, not only the motor rating.
Sometimes, if the existing hoistway has enough headroom and the structure can support the machine. A survey is needed before assuming a retrofit is feasible.
Compare systems
When you need to move a lot of people in a little time, economically, comfortably and reliably, you need a traction elevator. Ideal for high and medium-rise buildings.
Explore
It saves energy and space. JUSTIN intelligent machine room-less passenger elevator knows very well of environment protection concept. It saves energy and reduces consumption.
Explore
Hydraulic elevators are powered by a piston that travels inside a cylinder. An electric motor is used to pump hydraulic oil into the cylinder to move the piston, thus smoothly lifting the elevator cab.
ExploreJustin Elevators, Bengaluru
We compare mrl elevator systems against your building, traffic and maintenance needs before recommending an installation.
