There are many factors that impact radon levels in indoor air. High and low pressure, ventilation and temperature indoors and outdoors are just some of these factors. Radon levels do not remains constant either during a 24-hour cycle. They can vary a lot and this is why measuring operations over a longer period are more reliable. The longer you measure, the more accurate the measurement.

In order for measuring of radon in indoor air to give an annual average value (a reliable measurement), a measuring period of at least 60 days is needed, and the measuring operation must be performed in the heating period that runs from 1 October to 30 April.

Indicative short-term measuring can be performed if time is short, for e.g. housesales. It is also common practice to use this for post-checking radon decontamination. Short-term measuring must span over at least seven days. It does not give an annual average value and is not a reliable measurement either. It only gives an indication as to whether radon levels are high or low in the property.

If you want to take a radon measurement of your indoor air, please order measuring via our website. We then send track film packs to you to deploy in those spaces you want to check (for more info on how and where you must measure see under the tab Orders)

When the measuring operations are completed and the packs returned to Eurofins, we analyze them in our laboratory. A report is then sent to you. The analysis time varies a lot during the season. From March to May, it can take approx. three weeks before you get your report.