Machine Room-Less Elevator Versus Machine Room Elevator

Todd Irvin Uncategorized

A trend we’re seeing amongst building owners, developers, and architects is removing the elevator machine room and using a Machine Room-Less Elevator (MRL) instead.  We certainly understand that space costs money and any space saved could be used for something else, or removed altogether.

While it is sometimes appropriate to remove a machine room, there are times it’s better to have a dedicated room.  Additionally, there shaft size implications and passenger considerations when a sperate machine room is not provided.

With separate machine room: – the size of the room depends on the size of the motor/pump unit (if hydraulic)

  • The motor and controller are located inside this room
    • Noise is less in the shaft because these are located outside the shaft
    • If the unit is hydraulic, the tank and most of the fluid is in this room
    • Pit depth may be less since additional parts aren’t located in the pit
    • Easier to work on these components because they’re easier to access
    • Any replacement parts are easier to install since access is easier
    • Maintenance takes less time – which costs less money
  • The shaft is smaller
    • Don’t have to cram all the equipment inside the shaft
  • No access door is required for the shaft
    • Controller and motor are in the machine room
  • The shaft won’t be required to be temperature controlled
    • Only components that are sensitive to temperature changes are in the machine room
  • The initial cost of the elevator is less
    • Equipment cost is less
    • Less time to install the elevator

Without a separate machine room:

  • Motor (pump unit – if hydraulic) and controller are squeezed into the shaft
    • Noise is greater (when riding the elevator) since the motor is in there
    • Hydraulic fluid will be smelled by passengers (tank is inside shaft now)
    • Because everything is crammed into the shaft, it’s more difficult to work on the motor and controller
    • Maintenance takes longer – moving in tight confines – which costs more
  • The shaft is larger – to account for additional equipment inside the shaft
  • The access door is needed for manual lowering & to access equipment
  • The shaft will need to be temperature controlled

Please feel free to contact us to discuss your situation and our recommendations regarding your elevator system.

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