I have an old 9500 cfm swamp cooler that years ago had outlived its use by date but I saw no reason why it couldn't have another year or few blowing cooler air than the West Texas winds of summer time. The 1 1/2 hp motor would run if you gave it a spin changing the capacitor did not help hence the start windings are shot no problem I had another 1 1/2 hp motor to replace it with. the cooling pads were crumbled and all of the straw like material had migrated to the bottom of the pan OK replaced with new Aspen cool pads made of the same straw like fibers it took 6 22 x 34 pads to fill the 3 sides. the drip troughs in the tops of the side panels were rotted away so I made new ones out of flashing material on my siding break
the air comes out at around 30° cooler than amb.