This fan is a Canarm CP56 replacement. This fan was one of those 3 36" Nadairs from the early to mid 80s when I was there in 2011 infact they all were.
This fan is the latest edition of the Banvil Silver Line. This fan was one of those 36" Nadairs from the early to mid 80s when I was there in 2011 since this fan wasn't around in 2011, so this fan is a replacement.
Ah yes! I saw these fans in 2011. I couldn't remember what the fans exactly were, but now that you made videos of them, I now know. I thought all of them were 56" but appears 3 are 36". These 3 36" industrial fans are 36" Nadairs from the early to mid 80s
I also made a video of this fan in 2015. It's also a Banvil/Envirofan Gold Line with straight blades. There used to be a 3rd one but the blades were removed from it & only the motor was still there when I last saw it, but now it's only the upper canopies & downrod that remains of it.