Helsinki · Uusimaa · physics-led
Indoor air, measured and managed.
Cazdon Labs is a physics-led indoor-air practice for homes and businesses across Helsinki and Uusimaa. We handle statutory radon compliance, instrument-grade air-quality measurement, and air-purifier rental - and we tell you exactly what the numbers mean.
radon & indoor air, measured
Why indoor air matters
What we do
Four ways we keep your air right
Radon Compliance
Statutory STUK radon measurement, working-hours analysis, and remediation management - filed for you, end to end.
Learn moreAir Quality Measurement
A one-off, instrument-grade survey of particulates, CO₂, VOCs, temperature and humidity, with a plain-language report.
Learn moreLive Air Monitoring
Networked sensors and a live app dashboard - see your air in real time, with alerts when a threshold is crossed.
Learn morePurifier Rental
Rent right-sized HEPA + activated-carbon units by the month. We size, install, and maintain them. Filters included.
Learn moreWhy physics-led
A measurement is only as good as the person reading it
Cazdon Labs is run by a physicist. Radon is ionising radiation and its measurement is a dosimetry problem; particulates, CO₂ and VOCs are measurement problems of their own. Detector placement, integration time, ventilation cycles, calibration and seasonal correction all change the number. We treat every reading the way a lab would, and we interpret it honestly: when the maths says you're already compliant, or that a purifier wouldn't help, we tell you, even if it means selling you less.
- Radon detectors placed and integrated to STUK's method, so the compliance result is valid
- Air-quality instruments calibrated and benchmarked against WHO guidance, not guesswork
- A clear line between what filtration can fix and what needs ventilation or structural work
- Plain-language reports you can hand to an inspector, or act on at home
How it works
From first measurement to a clear answer
- 01
Tell us your space
A 30-second radon obligation check, or a quick note on what's worrying you about the air.
- 02
We measure on-site
STUK-approved radon detectors or calibrated air-quality instruments, placed to method.
- 03
We report clearly
Lab analysis and plain-language results: filed with STUK for radon, benchmarked to WHO guidance for air.
- 04
We resolve it
Working-hour analysis, remediation, live monitoring, or a right-sized purifier plan.
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