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Requirements for Radon Testing

Radon, chemical element symbol Rn, is a radioactive colorless gas. According to the EPA, radon has been found in homes all over the United States. It comes from the natural breakdown of uranium in rock, soil and water, and penetrates the cracks and holes of the foundation of your house, intoxicating the air you breathe. Radon can also get inside your home through well water. There are a number of requirements that you must fulfill before testing for radon in your house.

  1. Closed Conditions

    • To make sure that a radon testing service is able to detect the presence of radon in the air of your house, ensure closed building conditions in your house for at least 12 hours prior to the beginning of the measurement period.

    Air Filtering Systems

    • Permanently installed energy recovery ventilators should operate normally, but it is recommended that you do not switch on dryers, bathroom fans, range hoods and other mechanical systems that draw air from the building before testing.

    Radon Mitigation Systems

    • If you have any radon mitigation systems operating in your house, do not turn them off during the measurement interval.

    Air Conditioning

    • Air conditioners that recycle interior air inside can continue to work normally.

    Windows, Doors and Fireplaces

    • All windows and doors of the house must be kept closed. However, doors can be opened and closed to facilitate normal entry and exit. Fireplaces and combustion appliances should not be used, unless they are the primary source of heat in the house.

    Air Flows Near Radon Detector

    • Ceiling fans, portable air filters, portable dehumidifiers, and window air conditioners should not be operated within 20 feet of the radon detector to ensure accurate readings.

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