Otis Elevator has been producing a greener elevator for several years called the gen2. It is 50% more efficient than traditional elevators. It is a greaseless machine, which does not require additional lubricant costs and is better for the environment. If I remember correctly (it’s been a few years since researching it last) it is also adaptable for entering floor information prior to getting onto the elevator, saving passengers time, and it actually puts energy back into the buildings grid.
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