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Clean Air Stars @cleanairstars.com · 05/12/2024

And source control hoods such as this one tested by @simonjoosten.bsky.social pubmed.ncbi.nlm.nih.gov/35156259/

Clean Air Stars @cleanairstars.com · 04/12/2024

You can also get a 15% CADR boost using the 3rd Party Pureburg filter and simply removing the layer of carbon bsky.app/profile/clea...

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Clean Air Stars @cleanairstars.com · 04/12/2024

Great insights. Should be noted that if you remove the carbon layer from the Pureburg (easy to do) you actually get a CADR boost above the original OEM filter with the HEPA component being the same thickness. bsky.app/profile/clea...

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Clean Air Stars @cleanairstars.com · 03/12/2024

They are likely the same generic device white labeled under many different brands, but not aware of any specific testing of the Lorell 420 device.

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Clean Air Stars @cleanairstars.com · 28/11/2024

This specifies the conditions under which that risk was calculated (even then it would be challenging to read this chart reliably due to the additional variables of emission rate which can vary by orders of magnitude due to variables such as emitter’s viral load, vocalisation etc)

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Clean Air Stars @cleanairstars.com · 21/11/2024

You would need to be running them on the lowest speed at 153CFM each unless it was a very noisy classroom and you could run them at a higher speed.

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Clean Air Stars @cleanairstars.com · 19/11/2024

Which is why the presence of multiple whitelabelled versions of the same device can somewhat hedge against this risk. Here is an outdated list of sources for alternative filters simp.ly/publish/0P5fBm Absolute worse case scenario, the IKEA Starkvind filter is the same width, just a little shorter

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Clean Air Stars @cleanairstars.com · 18/10/2024

Thanks to feedback, the air cleaner recommendation tool at filters.cleanairstars.com now allows you to disable the WHO’s minimum 160L/s total clean air delivery rate recommended in the “Infection prevention & control in the context of COVID-19: a guideline, 2023” in the advanced section.

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Clean Air Stars @cleanairstars.com · 07/10/2024

This recommendation tool has a minimum total flow as recommended by WHO for infection control

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Clean Air Stars @cleanairstars.com · 30/08/2024

We need someone on threads to tell her to federate her account so those on other platforms can still see her content

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Clean Air Stars @cleanairstars.com · 13/04/2024

Worth noting that the WHO (and the filter recommendation tool) recommend a minimum total clean air delivery of 160L/s (576m3/hr) as per “Infection prevention and control in the context of COVID-19: a guideline 2033” for isolation rooms. iris.who.int/bitstream/ha...

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Clean Air Stars @cleanairstars.com · 04/02/2024

“Clean Air Delivery Rate Is All That Matters!” (also noise levels) itsairborne.com/clean-air-de... By @joeyfox #cleanair #hepafilter #hepa #aircleaners

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Clean Air Stars @cleanairstars.com · 07/12/2023

Interested to know what these are in the screenshot below. Do you know what the clean air delivery targets are? Either the space volume (for air changes per hour) or occupancy (for L/p/s)?

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Clean Air Stars @cleanairstars.com · 07/12/2023

If anyone in the UK has the large Amazon Basics air purifier it would be useful to get some feedback on noise levels at different fan speeds. www.amazon.co.uk/dp/B09XXTK7HB?ref_…

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Clean Air Stars @cleanairstars.com · 04/12/2023

We know the risk of transmission of viruses like SARS-CoV-2 during outside interactions is an order of magnitude or less than indoors. The only question is how we cost-effectively approach this level of risk in our indoor environments. mas.to/@cleanairsta...

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Clean Air Stars @cleanairstars.com · 04/12/2023

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Clean Air Stars @cleanairstars.com · 04/12/2023

You would want to know whether Trotec had the ioniser activated during their testing which would inflate the CADR and explain the drop in this study if it was used without it. Ionisers cause PMs to stick to surfaces (including the occupants and potentially their airways) www.epa.gov/sites/defaul...

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Clean Air Stars @cleanairstars.com · 04/12/2023

Excellent study looking at the practical implications and durability of performance of portable air cleaners in classrooms in Germany. Several important lessons to be learned doi.org/10.1080/0278...

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Clean Air Stars @cleanairstars.com · 27/11/2023

A reminder that for air filters, the lowest efficiency of removal is seen for particles around 0.3µm in size. Particles smaller than this are removed by diffusion, those larger by inertial impaction and interception.

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Clean Air Stars @cleanairstars.com · 27/11/2023

A reminder that different placement locations of portable air cleaning devices in a space can impact their effectiveness. Eg if installing a single large device it may be best placed in the mid-way point along the longest wall. doi.org/10.3390/ijer...

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Clean Air Stars @cleanairstars.com · 15/11/2023

For a mental model of what a goal-oriented approach means in terms of relative risk reduction and why it’s important, people can look at this graph from the Italian schools study. While the RRR achieved here may be optimistic, the principle still applies. doi.org/10.3389%2Ffp...

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Clean Air Stars @cleanairstars.com · 15/11/2023

Great to hear. Worth ensuring a goal oriented approach to achieve real risk reduction. This not-for-profit tool helps people achieve targets. Options for 10L/p/s for 30 people under 45dBA here filters.cleanairstars.com?country=US&m... And under 55dBA here filters.cleanairstars.com?country=US&m...

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Clean Air Stars @cleanairstars.com · 09/11/2023

For all Bluesky users, there is a feed called “Clean Air” that captures posts with a selection of key words related to cleaner indoor air, focusing predominantly on infection control. You can follow the feed at this link....

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Clean Air Stars @cleanairstars.com · 08/11/2023

Think of portable air filters as a window with a reliable, adjustable wind speed you can open anywhere in your room. If you want another window, install another device. They are available, inexpensive, and effective. It’s a portal to an outside world of cleaner air. Cleanairstars.com/filters

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Clean Air Stars @cleanairstars.com · 07/11/2023

Today is #WorldVentil8Day www.worldventil8day.com/facts-resour...

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Clean Air Stars @cleanairstars.com · 06/11/2023

“Only 2 days to go until #WorldVentil8Day! We'll be sharing inspiring news, compelling stories, and actionable tips all day long! Stay tuned and get ready to be part of the movement towards healthier air for everyone, everywhere.” worldventil8day.com/facts-resour... h/t @cathnoakes.bsky.social

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Clean Air Stars @cleanairstars.com · 06/11/2023

You can hide the filters with some fly screen without significantly impacting flow (see image). Alternatively you should see if you can rent devices like those from @smartairuk.bsky.social for larger events with poor ventilation.

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Clean Air Stars @cleanairstars.com · 02/11/2023

And here you can compare yearly total cost of ownership assuming 10L/p/s for 25 people under 45dBA, 4 year device lifetime, 12 monthly filter changes, and 40 hours per week electricity consumption. IAQ filters.cleanairstars.com?country=US&m...

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Clean Air Stars @cleanairstars.com · 02/11/2023

Whilst DIY air cleaning devices are useful for teaching the principles of air cleaning, retail solutions are available in the US at almost the same upfront cost per CADR under 45dBA. See devices ranked by $/CADR < 45dBA here (view on non-mobile browser). docs.google.com/spreadsheets...

screenshot of the google sheet ranking of air purifiers by $/CADR under 45dBA

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Clean Air Stars @cleanairstars.com · 27/10/2023

This cannot be repeated enough. The cost-effectiveness of cleaner indoor air as a public health intervention depends on the cost. Clean air delivery is a commodity. CADR/$ under a given noise level. Upselling with unnecessary & costly features simply reduces the cost-efficacy of the intervention.

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Clean Air Stars @cleanairstars.com · 25/10/2023

The most cost effective commercially available portable HEPA air cleaner available in the US is back in stock, the Taotronics TT-AP003. $80 with the coupon 20TA. Specs in the attached screenshots. Only downside is the inability to schedule with a plug timer. www.taotronics.com/products/tt-...

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Clean Air Stars @cleanairstars.com · 21/10/2023

Delivering cleaner indoor air with portable filters does not need to be noisy, nor is there any doubt on how many devices we need. All the hard work is done and answers provided here filters.cleanairstars.com Simply enter your desired occupancy or space volume and desired noise level.

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Clean Air Stars @cleanairstars.com · 18/10/2023

This is what this account sees. What does yours look like? The feed doesn’t appear to be refreshing with recent relevant posts so the server may be having issues

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Clean Air Stars @cleanairstars.com · 18/10/2023

Here is demonstration of the 0.3um particle count (top number) at the intake and outlet of a device with similar single pass efficiency as the Levoit devices compared to one of the Dyson devices. The high efficiency of the HEPA filter in the Dyson matters little here. @davidelfstrom.bsky.social

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Clean Air Stars @cleanairstars.com · 17/10/2023

Filters.cleanairstars.com Cleanairstars.com

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Clean Air Stars @cleanairstars.com · 17/10/2023

Companies that don’t test their devices against existing standards like AHAM AC-1 and market them accordingly are the companies that are misleading consumers. AHAM AC-1 was developed to solve the problem of consumer confusion and misleading marketing. Timestamp 18:00 here youtu.be/D96xOv3zq5c

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Clean Air Stars @cleanairstars.com · 17/10/2023

There are zero excuses for zero ventilation or air filtration. It’s either free or affordable. All it takes is awareness & simple action. If your space has no ventilation, you can introduce air filtration with the not-for-profit portable air filtration selection tool at filters.cleanairstars.com

Screenshot of the filter selection tool result

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