Heating, ventilation, and air conditioning systems play an integral role in libraries, archives, and museums. These systems help regulate our environments, filter pollutants, assist us in preserving our records, books, and artifacts and are now being called upon to help us decrease the chance of infection. Despite our dependence upon these systems there is little information given about them in our library and archival academic programs. This program will provide basic information about how HVAC systems function, the relationship between a properly functioning HVAC system and the long-term preservation of our collections, and ideas for advocating for a new or upgraded HVAC system.