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[frynda]

are all underground carparks ticking timebombs ? how can residents be protected from PM2.5 in highly concentrated proportions? … is ventilation mandatory in NSW unit blocks ?(it’s non existent in mine)

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[Sir Humphrey]

I thought exhaust fans were required if not naturally ventilated but I don’t know. Perhaps look into getting set up for EV charging. The changeover to non-emitting vehicles will be slower but perhaps a better use of funds than retro-fitting exhaust fans now.

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[frynda]

yes ventilation clicks in for excessive CO2 , but what about small particles that linger in the air .. I’m wearing a face mask every time i go 2 car … i hope other ppl will too
.. thanks

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[Sir Humphrey]

Any fan that exhausts gases such as CO, CO2 etc will also exhaust fine suspended particles. Since CO2 is produced at the same time as those suspended particles, both should be exhausted together. It might be that the exhaust system is insufficient but any particles that are fine enough to stay suspended will behave like a gas.

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