Thread by @PeteUK7

Quick thread on portable air cleaners.
It's important to use the right type & number of devices.
It can be complicated but using air filters that are too small or that use ineffective tech doesn't provide the best protection that air filtration can offer.
1/🧵

It isn't a question of buying just any air filter & thinking it has solved the issue.
Often I see products used that are undersized for the space, too noisy to operate or that use unnecessary gadgets that likely have no impact.
It's important to research & understand first.
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It's made more complicated due to insufficient info about products being easily available.
Many products exaggerate true performance imo.
For example, ideally we'd know CADR, noise & power usage for each speed. It's rarely listed aside from a few suppliers like @SmartairUk.
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Instead, we often only see the headlines which are CADR at highest speed & noise on lowest speed. Sometimes, even that isn't provided and instead a m2 coverage value is given. This is unreliable and not calculated at high enough filtration rate to be used as a C19 mitigation.
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Many things to consider but some basics are:
Volume of air space.
ACH target (consider occupancy & any existing ventilation levels too).
Acceptable noise level.
Power usage.
Maintenance & availability of replacement filters.
Device size/space available/power sockets.
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Then look at performance & specifics of products to match those requirements.
There are many good resources available.
One of the best is @CleanAirStars.
They've created an extremely valuable tool to help people decide which devices are appropriate for their application.
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Here is the CleanAirStars air filter selection tool.
The info here is extremely well researched and reliable.
It allows you to input various parameters (like some of those mentioned earlier) and it provides suitable candidate devices.
7/
cleanairstars.com/filters

There are many helpful & knowledgeable people around on here who can assist too.
So don't feel overwhelmed & make a bad product selection. Have a look at the tool, ask around, seek out resources & people to help.
Getting it right is critical to getting the best outcome.
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I provided a more detailed look at this some time ago with some other considerations noted too. Thread below.
Good luck with your endeavours to get cleaner indoor air.
Also check out @CleanAirClassrm & @mishwoz for extremely reliable info & advice.
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https://x.com/PeteUK7/status/1515061293321007108?s=20