Now the weather is turning colder a good time to remind that air cleaners can be a low energy approach to maintaining good indoor air when windows are less frequently opened. We looked at this recently for classrooms led by @henryburridge.bsky.social www.sciencedirect.com/science/arti... - ThreadSky

cathnoakes.bsky.social • 126 days ago

Now the weather is turning colder a good time to remind that air cleaners can be a low energy approach to maintaining good indoor air when windows are less frequently opened. We looked at this recently for classrooms led by @henryburridge.bsky.social https://www.sciencedirect.com/science/article/pii/S2950362024000316

Comments

susiesunshine.bsky.social•126 days ago

There’s a limited time offer on Smart Air’s Blast and Blast Mini - ends tomorrow. https://smartairfilters.com/uk/en/shop/

abigaildombey.bsky.social•126 days ago

Is there a good list of recommended air cleaners for UK schools?

A lot of the articles I’ve read have recommended US air cleaners which isn’t particularly helpful here.

Thanks!

cathnoakes.bsky.social•126 days ago

I’m not sure as I’ve tried to stay agnostic to brands in the work we do. There is a selection tool on clean air stars that I think is by country https://cleanairstars.com/filters/

abigaildombey.bsky.social•126 days ago

📌

abigaildombey.bsky.social•126 days ago

Brilliant - thanks!

cleanairstars.com•124 days ago

The listing for the UK market is a couple years out of date, specifically around pricing, but also availability.
Feedback is encouraged for devices that aren’t available or that are missing that can be added (with relevant data on CADR and noise levels at as many fan speeds as are available)

cleanairstars.com•123 days ago

Have updated many of the prices and availabilities for the UK. Was expecting price rises, but for the most part there have been significant falls in price, particularly amongst IKEA and Levoit devices.
Ultimately, clean air delivery is a commodity.

cleanairstars.com•123 days ago

Current leaderboard for sub 40dBA 10L/p/s for 20 students for under 4 devices in the UK.
£240 yearly total cost of ownership including annual filter replacements and electricity costs assuming 4 year device life. https://filters.cleanairstars.com/?country=UK&max-an=40&ach=10&room-size=&m3-or-cu=m3&no-of-occ=20&min_cadr=0&max_units=4&schedule=no&diy=no&tariff=0.22&filter-rs=12&lifetime=4&submit=submit

scarletp1792.bsky.social•125 days ago

📌

alherix.bsky.social•126 days ago

May I recommend you look how to make Corsi-Rosenthal HEPA filter with parents. https://en.m.wikipedia.org/wiki/Corsi%E2%80%93Rosenthal_Box

abigaildombey.bsky.social•126 days ago

Yes, I’m aware of the Corsi-Rosenthal box, but unfortunately last time I looked, the components were still extremely expensive in the UK.

(I’d be grateful to know if cheaper components have been identified.)

northboxsystems.bsky.social•126 days ago

My son and I have been making extremely low-noise PC-fan based air purifiers but it's been very difficult to get them into schools. Unless air quality is mandated by government its going to be a struggle.

https://northboxsystems.ca

mishwoz.bsky.social•126 days ago

Thank for posting here on 🔵🦋

Keeping 🪟 behaviour as normal in winter i.e keeping them shut

I see the data is taken from Class Act-phillips 3000i
Herefordshire CC -med8 maxvac

mishwoz.bsky.social•126 days ago

Would the
60% ⬇️ PM &
50% ⬇️Viral RNA
Relate to circa 2 units Phillips 3000i

40%⬇️PM
30%⬇️Viral RNA
Relate to 2 units
Medi 8

( 2 units based on estimate limit 1- 2 socket available)

cathnoakes.bsky.social•126 days ago

The values come from the range across all the simulations which include different locations, classroom types and seasons too, so you can’t just pick out the assumptions about air cleaners in the results.

mishwoz.bsky.social•126 days ago

Appreciate then
The values are an average
Across all seasons
And different classroom types

The figure for energy saving however only applies in winter

mishwoz.bsky.social•126 days ago

It would be interesting to know and differentiate
Data on
The performance of
2 very different air cleaners
Of
Different ACH

& Whether UV bulbs removed/ switched off from the medivacs help keep electrical costs down?

https://bsky.app/profile/mishwoz.bsky.social/post/3l7iialk4co2a

mishwoz.bsky.social•125 days ago

It's important to stay agnostic about brands.

Will you or @henryburridge.bsky.social in future write about data difference in performance in the air cleaners e.g Class Act & Herefordshire cc

This would help local PH authorities determine factors 4 optimal performance
https://bsky.app/profile/cathnoakes.bsky.social/post/3l7ieorfdr22a

mishwoz.bsky.social•126 days ago

Factoring in noise
Levels
2 X Phillips 3000i circa 4ACH ( prior comment on absence reduced by 20% Bradford HEPA arm RCT on first WHO Europe IAQ conference & Report Child North )

2 X 8 Medi circa 2ACH (? Thoughts @cleanairstars.com @peteuk7.bsky.social )
No comments on absence reduction

suefc.bsky.social•126 days ago

I am assuming that the only barrier to schools having air cleaners is that they aren’t allocated funding for them. Healthy children and staff are essential to learning - and attendance of course. The DfE need to make installing them a priority.

jjonesn.bsky.social•36 days ago

No the barriers to air filters in schools are not financial since many parents and some philanthropists have tried donating them and been refused. I think ignorance or worse a belief that infection is trivial, sterilising or helps the herd is to blame. They rarely even open windows + misinfo reigns.

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