Testing for radon is simple and cheap. Our team of scientists and Health Canada recommend a radon test kit that is: A Health Canada recommended LONG TERM radon testing devices, such as our at-cost radon test kit. Used long term, to get reliable results you need to test for radon for at least 91 days. Placed in an area that will measure the air you breathe most regularly. This is important as this will have the greatest impact on your health. Click here to learn more about where to test.