Anthem Services uses the most recent radon detecting equipment. We use a Continuous Radon Monitor (CRM) system; this allows us to see radon levels on an hour-by-hour basis. It also analyzes movement to help ensure accuracy of the test. To prepare for the test, all windows and doors should be closed and no whole house fans should be operated for a minimum of 12 hours before testing begins. The test takes 48+ hours and requires that all windows and doors remain closed. We offer same day report analysis at the completion of the test. View sample radon report.