u/Awkward-Camel-3408

hello. I have a 12u server rack for the home lab. it only has 2 120mm fans at the top of the case. I can do some drilling and all for more fans. the issue is the current fans are quiet but have really poor airflow. does any know some quietish(in our bedroom with no other option) that can move some serious air? I'll still and such if it 140mm or larger. they do need to be 120v