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Radon Measurement Condition Requirements

During the testing period, maintain the following  conditions to ensure valid measurement results:

Keep all doors and windows closed.

All windows must be kept closed. All exterior doors must be kept closed, except for normal entry and exit. Windows and doors must be kept closed for a period of 12 hours prior to the device placement date and remain closed until the device is retrieved.

Do not run fans.

Whole house fans must not be operated. Window air conditioning units may only be operated in recirculation mode. Portable window fans must be removed from the window or sealed in place.

Only operate gas appliances when necessary.

Fireplaces or combustion appliances, other than water heaters and cooking appliances, must not be operated unless they are your primary heat source.

Keep portable fans and filters 20 feet away from the measurement device.

Ceiling fans, portable air filters, portable de-humidifiers, portable humidifiers or window air conditioning units operating in recirculation mode must not be operated within 20’ of the measurement device.

Do not touch the measurement device. Operate your HVAC in a normal range.

If a device is placed in your unit, the measurement device must not be touched, tampered with, covered, removed or altered, and the location of the device must not be changed. Your HVAC system must be operated in the normal range – your thermostat should not be adjusted drastically, and your fan should be set in normal-mode.

Thank you for your assistance!

Failure to maintain these conditions could result in an incorrect test result. Your assistance in helping to ensure a valid measurement is greatly appreciated, thank you!