Published research on healthcare ventilation systems and scenarios suggests that the transmission of droplets containing viral material is possible in these situations. It is thought to be less likely in a well-designed and properly maintained typical HVAC system in a public setting.

Humidity levels in indoor environments can play a key role in infection control.  Modifications to existing HVAC systems can be made to improve the ability to regulate the space humidity.

NABERS have released information to assessors and building owners on how NABERS ratings will be affected by COVID-19. This has been developed into a readily accessible FAQ format to assist building owners, facility managers and NABERS Assessors. 

Appropriate use of ultraviolet germicidal irradiation in HVAC systems has been proven as an effective inactivation method for mould, bacteria and viruses, reducing the source of Healthcare-Associated Infections and a reduction of airborne microorganisms. This Advisory Note provides a basic understanding of UVGI and its applications

During the COVID-19 situation buildings experienced significantly reduced occupancy with some being completely vacated. Building services systems have seen reduced operation and some have been turned off. Ramping up or starting systems after a protracted shut down, especially those that are large, complex and interdependent, requires care.

With the return of people to buildings after the COVID19 period, a new way of thinking will need to be adopted to ensure building access control systems align to occupant health while continuing to maintain building security. Adaptations and enhancements to security technology will play a key role in how we maintain and manage the balance between a safe and healthy environment and still maintaining a secure building.

Completely shutting down mechanical and HVAC, fire protection and electrical systems for a protracted period and then restarting, particularly large and complex systems, can cause a number of serious problems. The cost and implications of shutting down and starting up may outweigh any advantages.

Many buildings are experiencing significantly reduced occupancy in the COVID-19 situation and building operators are seeking opportunities to reduce costs during this period. Reducing operation or shutting down HVAC systems is an option that can be considered. Many HVAC systems rely upon Cooling Tower Systems for heat rejection. There are strict regulatory requirements for the ownership and operation of Cooling Tower Systems throughout Australia to project protect public health from the risk of Legionnaires Disease. Completely shutting down mechanical and HVAC systems including Cooling Tower Systems for a protracted period and then restarting, particularly large and complex systems, can cause a number of serious problems. The cost and implications of shutting down and starting up may outweigh any advantages. It is important that the management and operation of cooling towers be carefully considered as a part of an overall in any change of HVAC system strategic plan.