Orla Hegarty Profile picture
Dec 7, 2021 6 tweets 4 min read Read on X
Public health #architecture
Ventilation required for ‘certain classes of inmates’:

Soldiers & healthy paupers: 600 cubic feet (17m3 ≈ 7m2 floor area)

Lying-in women (maternity) & the ‘offensively’ sick: 1,200 cubic feet (34m3 ≈ 14m2 floor area)

(source: Healthy Houses, 1876)
& it gets better

..the book was written by William Eassie, “late assistant engineer to Renkioi Hospital during the Crimean War”
Renkioi Hospital (1855) was a prefabricated hospital, designed by Isambard Kingdom Brunel with “the necessities of hygiene: sanitation, ventilation, drainage & temperature controls.. integrated in 1,000-patient hospital layout, using 60 of the unit wards” en.wikipedia.org/wiki/Renkioi_H…
& it happened due to the advocacy of “the splendid spinster” Florence Nightingale who reformed hospital practices & conditions (including ventilation to prevent disease spread) cpb-ca-c1.wpmucdn.com/sites.uoguelph…
who said that “If infection exists it is preventable. If it exists it is the result of carelessness, or of ignorance”

(Notes on Hospitals, 1863 books.google.com/books/about/No…)
& Florence Nightingale designed windows to ventilate rooms without draughts.. & hospitals with adequate space & ventilation for public health
scientificamerican.com/article/what-f…

• • •

Missing some Tweet in this thread? You can try to force a refresh
 

Keep Current with Orla Hegarty

Orla Hegarty Profile picture

Stay in touch and get notified when new unrolls are available from this author!

Read all threads

This Thread may be Removed Anytime!

PDF

Twitter may remove this content at anytime! Save it as PDF for later use!

Try unrolling a thread yourself!

how to unroll video
  1. Follow @ThreadReaderApp to mention us!

  2. From a Twitter thread mention us with a keyword "unroll"
@threadreaderapp unroll

Practice here first or read more on our help page!

More from @Orla_Hegarty

Feb 19
🇮🇪 Covid Inquiry- my comments didn’t all make it into @Independent_ie today 🧵 1/

“Over 9,600 people have died from Covid-19 in Ireland, including one hundred & forty one in the weeks since Christmas…
independent.ie/irish-news/pub…
..involving 31 residents. The pandemic is not over. An estimated 10% of those infected suffer long-term effects, & this burden of illness continues to grow.

Therefore, it is likely too soon to evaluate much of Ireland’s response. Decision-making is in the same hands… 2/
However there are meaningful questions that can be asked to improve current response & future-proof Ireland against repeat of this crisis.
Firstly the scientific failure –then & now– to acknowledge how the disease spreads.

Covid-19 is airborne & no amount of hand-washing.. 3/
Read 8 tweets
Oct 7, 2023
“Sick of your kids being sick? Clean air in schools may be the answer”

Co-written with @j_corey02 in @irishexaminer today

🧵of links to research mentioned & more information for parents & teachers #Schools #EdChat #EdChatIE 1/
(from 2021): “growing body of research on COVID-19 provides abundant evidence for the predominance of airborne transmission. This route dominates under certain environmental conditions, particularly indoor environments that are poorly ventilated” 2/ ncbi.nlm.nih.gov/pmc/articles/P…
“These viruses can be spread by an infected person simply by breathing. And like cigarette smoke, these viruses can linger in the air for hours in poorly ventilated spaces”

(from 2021, Prof @kprather88 ) 3/
Read 17 tweets
Sep 21, 2023
#Schools latest research for benefits of ventilation & filtration in classrooms 1/

🇨🇭“Classrooms with higher CO2 levels (poor ventilation) experienced more than 60% higher chance of Covid-19 outbreaks”

Houssein Gorji #WHOIndoorAir (vid @mdc_martinus)
🇬🇧 HEPA air filtration in classrooms reduced children’s absences by 20%
@CathNoakes at #WHOIndoorAir 2/
@CathNoakes 🇮🇹 Ventilation can cut school Covid cases by 82% 3/ reuters.com/world/europe/i…
Read 6 tweets
Feb 12, 2022
[Thread] a short story about pandemic misinformation & biased reporting

On 1 April 2021 I was contacted by a newspaper journalist.. 1/ Image
..the journalist attached the reply received from HSPC (who collect Covid data)

It DID NOT say 1 in 1,000 cases

It gave very limited data about *42 outbreaks* investigated by HSE

It reads as someone being helpful guessing at what might be outdoors (construction, sport etc) 2/ Image
..vast majority of Covid cases are not connected to outbreaks..& capacity to investigate outbreaks is also very limited

The journalist took a guess at *42 outbreaks* (262 cases) ..& erroneously related it to total number of cases at that time (236,600 cases, 1 April 2021) 3/ Image
Read 24 tweets
Feb 10, 2022
New 3-bedroom houses*:

Maynooth €463,000

Edenderry €239,000 (35km away)

Portlaoise €245,000 (70km)

Kildare €275,000 (35km)

Tullamore €279,000 (70km)

Ballitore €280,000 (50km)

Athy €295,000 (55km)

Navan €310,000 (40km)

*same regulations, standards, tax etc
Read 5 tweets
Jan 10, 2022
#Covid19 Schools, what to do?

No two schools are same & conditions vary from room to room & from hour time hour
Statistically there’s an infectious child in EVERY class now, so a classroom has same risk as an isolation ward in a hospital. This is a very high risk to manage 1/
🚦 CO2 (carbon dioxide) monitors are in schools to measure exhaled air. (They don’t measure virus)

..the more people breathing, the more CO2 build up

.. the more exhaled air, the more chance of inhaling virus particles

So more clean air & fewer people reduces the risks 2/
🚦@Education_Ire guidance suggests >1500ppm is ‘poor ventilation’ but in a pandemic this is too high (3% of every breath is not clean air)

Recommended is <800ppm (<1% of every breath is not clean air)

Outdoor air is ≈420ppm (very low risk unless close)
gov.ie/en/publication… Image
Read 10 tweets

Did Thread Reader help you today?

Support us! We are indie developers!


This site is made by just two indie developers on a laptop doing marketing, support and development! Read more about the story.

Become a Premium Member ($3/month or $30/year) and get exclusive features!

Become Premium

Don't want to be a Premium member but still want to support us?

Make a small donation by buying us coffee ($5) or help with server cost ($10)

Donate via Paypal

Or Donate anonymously using crypto!

Ethereum

0xfe58350B80634f60Fa6Dc149a72b4DFbc17D341E copy

Bitcoin

3ATGMxNzCUFzxpMCHL5sWSt4DVtS8UqXpi copy

Thank you for your support!

Follow Us!

:(