Our general guidance from A Citizen's Guide to Radon - (December 2016, EPA 402/K12/002) - suggests: :If your living pattern
changes and you start living on a lower floor of your home (such as a basement), you should retest for radon on that floor.
If you are thinking of selling your home and you have already tested your home for radon, review the Radon Testing Checklist to
make sure that the test was done correctly. If so, provide your test results to the buyer. No matter what kind of test you took, a
potential buyer may ask for a new test especially if: The Radon Testing Checklist items were not met; The last test is not recent,
e.g., within two years; You have renovated or altered your home since you tested; or The buyer plans to live in a lower level of the
house than was tested, such as a basement suitable for occupancy but not currently lived in.

The EPA recognizes the radon level 4.0 pCi/L as the official action level. Meaning, any building that has a level of 4.0 pCi/L or
higher should be effectively “mitigated.” Ideally, you want your radon level to be as close to zero pCi/L as possible, but in reality
the average radon level in the U.S. is about 1.3 pCi/L indoors and 0.4 pCi/L outdoors.

deally, you want to test under closed house conditions and on a day where there is little humidity. Closed house conditions
mean that you should make a conscious effort to keep doors and windows closed in the house during testing, but you can still
enter in and out of your home. Closed conditions should be kept for up to 12 hours before the test is started. The test should be
conducted at least 36 inches from the floor and 12 inches away from exterior walls and frequently-used doors.
Remember that the test should not be conducted in the crawl space of the house, but rather in the room above or beside it.
Please keep in mind that you should avoid testing during heavy rainstorms. During a heavy rainstorm, your radon test can be
skewed because of differences in atmospheric pressure and humidity

Like most gasses, radon concentration fluctuates daily. The amount of radon gas emitted from the ground and the amount of
radon gas particles entering that actually enter our home.Radon will not be distributed evenly around a room so the way it's
measured has to accommodate that.
Imagine adding a dash of cream to a cup of black coffee but not stirring it. If you then take multiple samples from a small spot
of that coffee to test for the level of cream, you would get very different readings over time as the cream slowly blends in with
the coffee.
Radon sampling works in the same way. As a result, AEGtest radon sensors give a short-term sample reading as well as an
Accumulated AVG reading. This is why we recommend allowing your radon detector to measure for at least 3-7 days so that
the monitor can obtain enough air samples to provide a reliable long-term, average radon level.

Radon is not an instant measurement, like temperature for example: radon is measured as an average value. In practice, this
means that the sensor counts the alpha particles of radon for each sample of air it analyzes. The detector works continuously,
then every hour it produces a data point that contributes to an average reading. This is why you can see your radon levels as
the averages over 24hrs, 48hrs, 96hrs etc...
AEGtest device are designed for domestic use. This means that they are designed, made and sold to collect long term
averages.
For the average consumer, as long as the device collects enough data points, the detection results will be more accurate: since
the measurement is fundamentally an average of the amount of the radon (Rn222) alpha particles present in all the samples of
air collected by the sensor, this means that the longer the measurement, the more data points, the more accurate the readings
become. This is an important thing to highlight: we usually recommend you measure for as long as possible, for at least3-7 days.
After one month, in fact, you have probably gone through a wide-enough range of temperatures, humidity levels, maybe you
have experienced a few days of rain, etc. and your detector has gathered enough data to start indicating a pattern: the average
will eventually settle on a reference level.

The device is exposed to radon during final factory testing, so initial readings may be high.Try blowing on the air inlet with a fan for a few minutes to clear residual radon, then restart the measurement.

After restarting the device or using the“Retest" function, the measurement screen will reset (historical data is preserved). Please wait 6 hours for the first reading to appear.

Yes. High humidity can affectradon readings.To ensure accuracy, keep humidity below 90%by using a dehumidifier or air conditioner, or place granular(non-powder)desiccants near the air inlets on the sides or bottom of the device.

Yes. Strong light (such as sunlight or camera flash)may interfere with the sensor.Althoughthe device has a built-inlight-blocking film,it is still recommended to avoid directexposure.If exposed, place the device in a dark place like a drawer and wait beforere-measuring.