Indoor Air Quality & Radon Resources

How to check air quality at home: what to test for (radon, PM2.5, VOCs, CO₂, humidity), the best way to test, and a simple step-by-step guide.

Is your home too humid? Learn what 30%, 60% and 70% humidity mean for your health and home, the ideal level to aim for, and how to fix it.

What do PM1, PM2.5 and PM10 mean? See the difference between particle sizes, safe PM2.5 levels indoors, where particles come from, and how to reduce them at home.

Is the CO2 level in your home too high? See safe ppm levels, the symptoms of high CO2, what causes it, and simple ways to reduce it, including in your bedroom.

Radon is an invisible gas and the leading cause of lung cancer in non-smokers. See a radon levels chart in pCi/L and Bq/m³, what's safe, and when to act.