Extremely noisy and powerful exhaust fans running!

Next to a five guys I heard some noisy fans from an air vent. I noticed there was a parking garage right there so I went inside and found these. Although they are small, these are some of the loudest fans I've ever heard! I had to pretty much yell over all that noise! turn up the sound!

[@lennongroover8909]

It’s beca the Plates are so light and small and the motor so powerful Which creates blade slap basically like a Tonna homework after excepted spinning so fast that just comes out as I am which creates blade slap basically like what’s on the hook after except it spinning so fast that just comes out as a humming noise

[@vicentecarrasco9792]

do you know what is the brand of these fans?

[@lennongroover8909]

What if your patio fan was that loud

[@lennongroover8909]

Or your fan that keeps you cool on he patio