Lift mecanhics

Today we met at gissepiis at 10 we met a lift mecanhic it was sick. He took us up into lift six first, because its a non detachable lift the housing is old. Our lift guy told us that its more efficiant to run a lift from the top to the bottom. We than went to lift 12 which is detachable so the lift houses where huge and alot more efficiant and advanced. We than went to 15 because instead of a counterweight like most oldschool lifts had it had a hydrolic system instead.