We spend 90% of our time indoors and nine hours every day sharing spaces with others. While we may not give much thought to indoor air quality, we certainly should. The air we breathe indoors is up to five times more polluted than outdoor air. Public spaces, like offices, health care facilities and schools are breeding grounds for bacteria, viruses, dust, allergens and odours. While we all recognise the need to wash our hands and clean common surfaces like doors, tabletops, bathrooms, toilets, etc., It’s not enough. We need to clean the air.