Filters in ventilation systems

I am surprised that no one has mentioned the effectiveness or otherwise of filters in ventilation systems. Many modern buildings recirculate air through ducted heating and cooling systems. As do aircraft. Can someone please give some guidance on the effectiveness of the filters in such systems? Do these filters stop the virus as would would be expected in hospital operating theatres or intensive care wards? Will duct work have to be cleaned out? And what about the maintenance men who have to change them?

Why the contribution is important

To open up all sorts of buildings.

by gusmacdonald on May 08, 2020 at 03:16PM

Current Rating

Average rating: 4.2
Based on: 7 votes


  • Posted by JBAKER May 08, 2020 at 15:22

    Never thought about it. Good idea.
  • Posted by Rm89 May 08, 2020 at 15:52

    COVID19 isn't airborne, it's a protein. It spreads by getting in to your system via your hands touching your face, ears or genitals. If it were airborne we'd be in a lot more trouble!
  • Posted by jenny333 May 08, 2020 at 16:01

    As it is airborne, I had had a passing thought about ventilation systems. But it would have to be able to suck the air out, and dispose of it safely. I don't know enough about how they work though.
  • Posted by Elkie May 08, 2020 at 16:24

    Entering and leaving a supermarket, I usually try to avoid breathing in. I consider that good practice, not only now during this pandemic. Ventilation systems are breeding spaces for all sorts of germs.
  • Posted by IndyScot1000 May 08, 2020 at 17:48

    I agree with Ellie, I hate air conditioning systems, at work they just continually blow air into you face, not fresh either, I don’t even use them abroad, always thought they be a brilliant conveyor of germs. I don’t breathe either going in or out of shops that blast of air goes straight into your mouth, yuck ,filthy. Hazard to health I’d say and also really bad for the environment.
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