My parents had a 10,000 btu Norge with a wood (not wood grain) front. It was bought in the spring of 1964 and cooled our different apartments and house for years. The air that came out was ice cold. Mom hung a curtain at the top of the stairs. Upstairs stayed cool and downstairs comfortable.
In '87 I was working at Caldor and bought an 5,000 btu Emerson Quiet Cool for my room, parents bought another for their own room and the Norge moved downstairs to the dining room. The Norge wound up getting loaned to a friend who needed one and from there to another, and another, and another... My parents lost track of it about 10(?) years ago and as of then it was still humming just as smoothly as it was in 1964. Not one single problem ever!