I want to point out that the backup chillers on the roof are located directly across from the from the research wing elevator. With the the chillers running, there is a noticeable hum the closer you get to the 4th floor. This is not unusual but I did want to make everyone aware that this is not a problem with the elevator it self. 

Work on the chilled water loop is scheduled to finish up the Morning of January 19th, so please be patient.