According to the EPA estimates, radon is the #1 cause of lung cancer among non-smokers. This type of radon testing is designed for real estate transactions, and is an electric monitor set in the home for a minimum requirement of 48 hours. Readings are taken by the monitor every hour to help assure the most accurate results are recorded for the test. For more information on radon, go to http://www.epa.gov/radon.
If you are a homeowner and concerned about radon, long-term at home test kits are available and MN residents receive a discount (the code is located on the site) Minnesota Department of Health - Radonova