I have been working at a place that tests fire sprinklers.
They mock up different types of buildings or warehouses and light em up.
I can not show you any pictures of the tests but here is a shot of an inside wall of the large burn room.
What is the proper wiring method in a burn room?
Here is an outside shot, the building is about 65' high and the duct work you see sucks out the smoke from the fires.
Four fans each powered by 500 hp motors get the air moving.