Sotirios Papathanasiou

@seetheair.bsky.social

Founder GO AQS WELL Building Institute Air Advisor Expert Advisor @ The Safer Air Project Indoor Air Quality is the value that reassures the well-being of occupants. www.seetheair.org www.goaqs.org

A devastating wildfire has directly killed 12 people right here in the municipality of Almería, one of the places I call home. Wildfires kill twice: once directly through the flames, & again, prematurely, through the toxic smoke and fine particulate matter that fills the lungs of everyone exposed.

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They are doing something very important: put serious money behind clean indoor air. That is very good news and there is a high likelyhood this will result in advancements to this neglected field, but I think they could have an even bigger impact with some changes So I wrote a short Essay on it:

Blog — Indoor CO₂ Atlas

indoorco2map.com

Linsey Marr@linseymarr.bsky.social · last mo.

We treat respiratory infections like the cold and flu as minor nuisances. The evidence increasingly suggests they’re anything but. I'm excited to be an advisor for Intercept, a $500M bet to make them a thing of the past. interceptfund.substack.com/p/e9438538-4...

Added 2 new chart types to the analysis page in addition to the boxplots. These convey the Information way better on first glance than boxplots I think. And the more I use the GO IAQS(tandard) from @goaqs.bsky.social, the more I am convinced that 3 categorys are enough to provide an overview

Stacked bar chart of indoor CO₂ distribution by GO IAQS air quality category. Bars show % of locations in each category per group, sorted best to worst. Data: 6.427 locations · 14.249 visits shown · 15 location types (most frequently measured). Filters: all countries; all location types; Apr 11, 2024–May 24, 2026. doityourself: Good 93.4%, Moderate 6.6%, Unhealthy 0.0%. fast_food: Good 81.4%, Moderate 16.5%, Unhealthy 2.0%. clothes: Good 79.7%, Moderate 18.4%, Unhealthy 1.9%. mall: Good 75.5%, Moderate 23.6%, Unhealthy 0.9%. pharmacy: Good 71.5%, Moderate 26.1%, Unhealthy 2.4%. museum: Good 70.3%, Moderate 25.3%, Unhealthy 4.4%. convenience: Good 69.9%, Moderate 26.4%, Unhealthy 3.7%. bakery: Good 68.7%, Moderate 27.9%, Unhealthy 3.4%. Other: Good 67.2%, Moderate 29.0%, Unhealthy 3.8%. chemist: Good 60.4%, Moderate 36.6%, Unhealthy 3.0%. hotel: Good 60.2%, Moderate 35.2%, Unhealthy 4.5%. restaurant: Good 58.1%, Moderate 32.0%, Unhealthy 9.9%. cafe: Good 57.8%, Moderate 33.1%, Unhealthy 9.1%. supermarket: Good 36.2%, Moderate 54.6%, Unhealthy 9.2%. doctors: Good 31.9%, Moderate 53.1%, Unhealthy 15.0%.Strip chart of indoor CO₂ levels  by brand. Each dot represents one measurement, coloured by GO IAQS air quality category (Good <800 ppm, Moderate 800–1400 ppm, Unhealthy >1400 ppm). Vertical bar marks median per group. Data: 1.446 locations · 4.410 visits shown · 12 brands (most frequently measured). Filters: Germany; Supermarkets; Apr 11, 2024–May 24, 2026. Konsum Leipzig (n=36): median 729 ppm. Kaufland (n=65): median 788 ppm. EDEKA (n=238): median 852 ppm. Unknown / Independent (n=116): median 853 ppm. NORMA (n=50): median 885 ppm. Denns BioMarkt (n=37): median 888 ppm. REWE (n=286): median 925 ppm. PENNY (n=75): median 977 ppm. Netto Marken-Discount (n=131): median 1003 ppm. ALDI Nord (n=99): median 1033 ppm. Lidl (n=180): median 1218 ppm. ALDI Süd (n=133): median 1243 ppm.
Aurel Wünsch@aurel.indoorco2map.com · 3mo ago

I added some new features to the analysis page. One of them is the ability to generate social-media-ready images of the charts - including ALT-text. I also added an (by default enabled) option to adjust all measurements to local time - which makes more sense when comparing across continents than UTC

Sometimes people go inside churches and temples to protect their spirit, but air quality can be very unhealthy for the body. Candles release lots of harmful small particles (aka PM2.5) inside closed spaces. For reference, this concentrations are way worse than walking in New Delhi. #AirQuality

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