I am returning to this thread to report that the workmen were indeed well-muscled, not particularly stunning in looks, but high in competence and very pleasant. They came today and removed all three windows in my apartment at the same time, which made the place a bit chilly since there was a snowstorm raging outside. They took no offense at my curiosity as I stood around watching them, and gratefully accepted an offer of a cup of tea with cookies. I was there in my fleece jacket, not nearly as cold as I had thought I would be - one of them was there in a cotton short-sleeved tee shirt, and he was the one hanging out the window!
I now no longer live in a wind tunnel, but that's okay, I can open the new windows to get the same effect any time I want to.