Frequently Asked Questions

  • Laboratory HVAC reduction occurs every evening from 7 p.m. to 7 a.m. (including weekends and holidays). 
  • During peak energy demand days, UMB may begin this reduction before 7 p.m. 

  • Regularly scheduled HVAC reductions are not actively communicated. 
  • If UMB elects to reduce HVAC, an email will be sent alerting the campus to the anticipated change in status. Additionally, text messages will be sent to anyone affiliated with a laboratory space (registered in SciShield).  
  • In the event of an unscheduled reduction, UMB will send communication as soon as possible. Please note, there may be little (less than 30 minutes) or no advance notice.    

  • During HVAC reduction periods, air change rates are maintained. However, temperature and humidity levels may increase. Additionally, fume hood performance will be impacted.  

  • Benchtop work and activities conducted inside certified, unalarming biological safety cabinets may continue during HVAC reduction periods. However, any research that requires the use of a fume hood should be paused unless specific approval has been granted*. 

  • If your fume hood begins alarming, immediately stop work, lower the sash completely, and contact EHS for assistance at 410-706-7055. 

  • Call EHS at 410-706-7055 and provide location and details. 
  • Note: If you smell chemicals while working in a fume hood, this may indicate compromised airflow or containment. Immediately stop work, lower the sash completely, and contact EHS for assistance at 410-706-7055. 

  • Fume hoods should not be used during HVAC reduction periods.  
  • If your work requires a fume hood during HVAC reduction hours, contact EHS for a risk assessment*. 

  • Reactive chemicals, chemicals that require respiratory protection, and chemicals that generate hazardous vapors should not be used during HVAC reduction periods. 

  • Report fume hood issues immediately to EHS by calling 410-706-7055. 

Contact Work Control. 

*Requesting an EHS Risk Assessment

  • EHS is committed to supporting the safe continuation of research.  
  • Email EHSAudits@umaryland.edu with your name, location, and a brief description of the work in question. 
  • To help minimize disruptions to critical fume hood–dependent experiments, researchers are encouraged to review planned activities and submit requests in advance. 
  • Assessments are generally conducted during regular business hours and are subject to staff availability. 
  • Please note that EHS cannot guarantee approval to initiate or continue research activities during HVAC reductions.