[fintstone]

We had a lot of them in Florida when I was a kid (pre air conditioning) to catch the sea breeze. Most houses had a room with them on all sides dubbed a "Florida room." Needed a screened area for "outdoor living" because mosquitos were so bad. They are still great because using smaller pieces of glass is generally cheaper than larger ones in most cases...and take less force than cranking a large one.

Depending on how often he is there and how many windows, I would replace the screens with plexiglass and swap them out when he is coming to visit.