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, but vary. 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. In some countries the measuring operation must be performed in the heating period, e.g. 1 October to 30 April. Other countries demand that a measurement is done a full 12-month period, or that a seasonal correction factor is applied. Eurofins Radon has possibilities to adapt your measurements to your local needs. Please contact us and we will tell you more, 

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 as reliable measurement as the long term measuremnts. It gives an indication as to whether radon levels are high or low in the property.

If you want to make a radon measurement of your indoor air, please order measuring via our website. We then send detectors  to you to deploy in those spaces you want to check (for more info on how and where you need to measure see the Ordering guide.)

When the measuring operations are completed and the detectors returned to Eurofins, we analyze them in our laboratory. A report is then sent to you. The analysis time varies a during the season. From April to May, it will take at most 10 days before you get your report.