Mcquay mushroom exhaust fan

At cascade high school, in addition to the small greenhouse and at one point the big greenhouse (1975-2017) there are these tiny little greenhouses attached to 2 of the science classrooms, there is a mirror image of this one on the other side of the building. This fan is inside the two of them and this one has a SUPER cool startup sound, very 3 phase motor like. I'm not 100% on the brand so comment the correct brand if I'm wrong.

[@roberterwin9485]

thats actually made by jennfan they are called cwd fans they are most common back in sixties 50s on maltshop hoods lodge hoods small church kitchen hoods diner hoods some barbeque restaurant hoods over the stoves mostly used by mom and pop old school buildings they was outlaw for use on exhaust hoods because their not grease rated only heat and steam not for grills or open flame might can get away with use over a griddle with no grease use or heavy grease deposit being pulled thru it but they are cool little fans pulling air from a garage or sheds that may get hot in summer though

[@evanchapmanfanman]

I figured that it was made by Jenn air after finding another one of these fans under the Jenn air moniker, model cw8 if I remember correctly.