I was in the Costco this weekend waiting in line to get a vaccine and decided to look up. I was amazed at the warehouse sized ceiling fans they have. They are huge.
There's a company based in Kentucky named Big Ass Fans that makes a lot of these. I talked to them at a job fair about 15 years ago, at least at the time they were writing a lot of software for motor controllers, etc. in house. Sounded pretty interesting.