These regulations outline the mandatory engineering standards for designing and installing mechanical ventilation within various building types. Systems must maintain a balanced airflow between supply and exhaust to ensure that fresh outdoor air consistently reaches the areas where people breathe. Designers are required to calculate minimum air rates based on the maximum number of people expected to use a space, using standardised tables or approved data. The code also specifies that additional measures are necessary if smoking is permitted, as standard rates assume a smoke-free environment. Ultimately, these rules ensure that indoor air quality remains safe and sufficient throughout the entire duration of a buil ...