Today when I arrived it was relayed to me that there was a loud noise coming from the make-up air unit in the warehouse that is closest to the office. I diagnosed a failed blower wheel bearing inside this unit. The blower wheel was checked for balance and that all of the fins were attached and not damaged. The bearings were measured and the manufacturer was contacted to confirm the bearing sizes. I sourced the new bearings and will send an estimate for the repair via email to Chase. Currently the unit has been turned off to protect the blower wheel from further damage. Thank you, Jon Tech notes: Rupp ram-m-20//J# 4883118