Rack CFM

[nasomi]

I'm looking for a way to determine how much cfm my rack produces. My rack is in my basement in a server room that isn't enclosed yet. To enclose it, I need to make sure I have sufficient airflow. I picked up 4 50cfm bathroom ceiling fans that'll vent outside. I'm not sure if that's enough though. I don't have ceiling space so I was thinking the wall behind the rack. I was planning on tieing them into a single 6" duct.

 

[mb300sd]

Have you considered a through-wall fan like this

https://smile.amazon.com/gp/product/B002092S6I/

I have one in my server/network closet that vents outside. It's tied to a thermostat that keeps the closet at 80 degrees. Much better cfm than the bathroom fans.

 

[nasomi]

i had an inline version of that, i have an air duct going to the outside wall. However after 6 months the bearings seized up. Replaced it, and they seized up again. So now i'm looking for another option.