What kind of exhaust fans do you have?
They are "Spartan"s that I believe is now handled by Grainger. The
original owner bought them from a local place called Wickes RIP that
was killed by the chains. All the paperwork came with the house along
with the papers on everything else he ever bought.
This is a 24" deal with a 2 speed motor, 1/4hp on high probably about
1/10 on low. and it will pop your ears if you don't have enough
windows open.