Preprint on masks and neck gaiters for source control on manikin by experienced group NIOSH medrxiv.org/content/10.110… N95 blocked 99% of aerosols, surgical mask 59%, 3-ply cloth mask 51%, neck gaiter 47% (1 layer) and 60% (2 layer), face shield 2%

Radon is a real issue here in SW England. As well as being effective, #MVHR is often a less disruptive retrofit solution than trying to install a Radon barrier. Plus, you get all the other MVHR benefits: good #IAQ and opportunities for energy saving, draft free indoor comfort

This is a very helpful explanation of the relative risks of catching Covid in different situations... english.elpais.com/society/2020-1…

That is typical for a school without comfort ventilation. This is why #Passivhaus recommends HRV 25-30 m³/h/person; CO2 will b down to less than1000 ppm. In a school room without, you'll have to open windows completely for 5 min every 20 min. Good luck with the education!

x.com/Kate_de/status…

As embodied energy in construction projects becomes more significant in the energy transition away from fossil fuels, this manufacturing innovation, together with greater recycling, will have a part to play. youtu.be/ywHJt88H5YQ

While #MVHR should help to mitigate this, simpler would be not to burn the wood in the first place ... theguardian.com/environment/20…

At the height of a pandemic, school ventilation is critical. @anthealacchia writes about pioneering research into this topic in Architype-designed schools. Read her story at the links below. Irish edition: issuu.com/passivehousepl… UK edition: issuu.com/passivehousepl…

This is a good listen on #IndoorAirQuality and #COVID19 and how #MVHR allows you to maintain good #IAQ without sacrificing energy efficiency. bbc.co.uk/sounds/play/m0…

Pretty amazing that we knew about ventilation and indoor air quality back in 1896. Sad that it takes 2 full blown global pandemic since then to heed these lessons. So much suffering preventable by adage: “The solution to pollution is dilution / ventilation”. #COVID19 #Ventilate

Curious edge case... x.com/AR_Clarke/stat…

What is a #Passivhaus like after 30 years... youtu.be/gG8WK6CD120

“Nobody really wants to be in the situation of having to suck so much CO2 from the atmosphere. But that’s where we are – we’ve delayed [climate action] for too long.” theguardian.com/environment/20…

Improve building ventilation or risk them becoming breeding grounds for more infections, senior engineers warn buff.ly/3epjrzw

Couldn't have said it better ... why deep retrofit is the solution and how it can be successful; how it can be done on a reasonable basis ... (again: it's all about the walk - but we need to talk about these real solutions) youtube.com/watch?v=wN34zF…

This is a great achievement. Well done Exeter City Council #Passivhaus

The experience of #Passivhaus described in overview in this article theguardian.com/money/2022/feb…

We've #justsponsored Lindab UK, who's fundraising for The British Red Cross Society on JustGiving. Donate now justgiving.com/fundraising/li…