Ventilation controls encompass a range of strategies designed to regulate airflow, temperature, and humidity within a building—factors directly impacting mould growth and indoor air quality. Proper ventilation dilutes and removes airborne contaminants, including mould spores, bacteria, and volatile organic compounds. In many workplace environments, mechanical HVAC systems (Heating, Ventilation, and Air Conditioning) play a pivotal role in achieving these objectives, particularly when aligned with relevant standards such as AS 1668.2 in Australia.
A well-designed ventilation system ensures that fresh air replaces stale indoor air at an adequate rate, which helps keep humidity levels in check. High humidity encourages mould colonization, so controlling moisture via ventilation is a primary defence against fungal growth. Dehumidifiers can be integrated or used as standalone units in especially damp locations, further improving moisture control. Additionally, filters—especially HEPA filters—within ventilation systems can capture a significant portion of airborne spores and other particulates, improving overall indoor air quality.
Beyond mechanical solutions, passive ventilation methods (like windows, vents, and strategic building design) also play a role in preventing stagnation and moisture buildup. Employers and building managers should regularly inspect and maintain ventilation equipment to ensure systems are operating efficiently. Poorly maintained or malfunctioning HVAC components can inadvertently increase the risk of mould by failing to manage temperature or humidity, or even by dispersing contaminants if filters and ducts are not cleaned as needed.
