HEPA & healthy classroom air FAQ

Air pollution is today’s greatest environmental health risk. Good air quality supports children’s healthy development and contributes to staff wellbeing.

Explore the topics below for answers to frequently asked questions about HEPA air filters and natural ventilation. Learn why indoor healthy air is so important, and what air quality monitors can tell us.

This FAQ is for schools or other buildings with natural ventilation or hybrid (natural combined with mechanical ventilation) systems. It’s not for schools that use only mechanical ventilation or have HVAC systems.

HEPA filters & how to use them

Natural ventilation tips

What to do during bushfires

About indoor air quality

About air quality monitoring


This FAQ is supported with funding from the Australian Government’s National Environmental Science Program.

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More information
Air quality and ventilation 
More About Air filtration
Choosing HEPA units 
Using HEPA units 
Technical resources: 

These pages will be updated as information comes through; please email cleanairschools@unsw.edu.au with comments or suggestions.