Finally, there is a third criterion that is at the centre of many disputes, i.e. the "energy consumption". Although not yet published a regulation on the classification efficiency of the elevators, there are many manufacturers who are marketing products in energy class A.

Many books and studies have been written to support the view of the choice of the traction elevator with gearless machine, and others in favour of the traction piston.This guide will certainly not parties to anyone, but will give you food for thought and put you in a position to make a decision in an autonomous way : 

1. An official lift energy classification, now ruled by VDI 4707, does not exist!

2. To respond to those who vigorously argues that the lift technology gearless winch is absolutely the best, because it is environmentally friendly, we would like to remember that these types of lifts energy at all stages of the lift, or uphill, downhill and in stand-by.

3. To reply to those who vigorously argue that the lift technology with traction piston is absolutely the best, we would like to recall that the commitments of power required for installation are very high.

 We suggest to the reader of these pages should rest yet for a few minutes and explore some concepts by reading the following two articles: How much does an elevator cost? and Selection Guide Product.