As part of One South Dearborn’s normal operating procedures, heating, ventilating and air conditioning (HVAC) is provided as directed in each Tenant’s lease. Any HVAC provided outside of normal business hours will be on an “as requested” basis only.

We ask that the requests are submitted before 5:00 p.m. on the day that overtime HVAC is needed.

The best way to contact for HVAC Requests is as follows:

  • Standing Requests - Please submit to the Management Office if your firm regularly operates beyond normal business hours.
  • Weekend Requests - Please submit to the Management Office prior to 5:00 p.m. on the preceding Friday.
  • After Business Hours Request - Please call Lobby Security at 312-386-8316 to place request.

If an engineering staff member is not on site at the time of the request, the tenant will be responsible for paying additional over time engineering labor charge of 2 hours (per call) to schedule the request.

If there are any questions, complaints or requests please contact the Management Office at 312-386-8300 or via email at osd@hines.com.