Air quality 22 Jun 2026 · 5 min
The invisible chemicals in a new room: formaldehyde and VOCs
That 'new furniture' or 'fresh paint' smell is a cocktail of gases. Most are harmless - a couple aren't.
Read articleBlog
Field notes on radon & indoor air
Plain-language, sourced writing on the science and the rules - from the people doing the measuring.
Air quality 16 Jun 2026 · 5 min
Damp and mould: the most under-rated indoor health risk
In a Nordic climate, moisture is the quiet driver of a lot of respiratory trouble - and it's measurable.
Read article Science 9 Jun 2026 · 6 min
How we actually know radon causes lung cancer
Not a hunch - decades of converging evidence, from uranium miners to a pooled study of thousands of ordinary homes.
Read article Air quality 2 Jun 2026 · 4 min
Your kitchen is probably your dirtiest air source
Frying a steak can briefly push fine-particle levels past a busy roadside. The fix is mostly about extraction.
Read article Air quality 28 May 2026 · 5 min
What CO₂ reveals about your ventilation - and your team's focus
Carbon dioxide is the cheapest honest signal of how well a room is ventilated. It also tracks how well people think in it.
Read article Compliance 12 May 2026 · 4 min
The landlord fallacy: who is actually liable for workplace radon?
The single most common compliance mistake among Helsinki SMEs is assuming the building owner handles radon. The law says otherwise.
Read article Measurement 3 Apr 2026 · 5 min
Failing a radon test can still mean you're compliant
A scary first number isn't a verdict. Here's why daytime ventilation can legally put you back under the limit.
Read article Measurement 20 Mar 2026 · 4 min
Why radon is a winter problem in Finland
It isn't bureaucratic fussiness that radon is measured September to May. The building physics of a Finnish winter is the reason.
Read article Air quality 18 Feb 2026 · 4 min
What an air purifier can - and can't - do for your air
Filtration is genuinely useful. It also can't touch radon. Knowing the difference saves money and protects health.
Read articleMore articles in progress. Every piece is reviewed against primary sources before publishing.
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