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RIDGEWELL RADON Long-Term Kit Runs 91 days or more GM-LT-0001 Illustration
HOW TO TEST POSTAGE PAID PREPAID RETURN Tracked, to the laboratory GM-LT-0001 Illustration: kit contents Window closed GM-LT-0001 20 in or more Lowest level you live in Away from drafts, kitchens, bathrooms, and exterior wallsIllustration: placement Radon test report Short-Term · 2 to 4 days · Laboratory result 3.1pCi/L 024 DOWNLOAD PDFIllustration: sample report

Ridgewell Long-Term Radon Test Kit

Your average across the seasons. Runs 91 days to a year.

$44Lab fee and return mailer included

Online ordering is not open yet

About 99 to 380 days from order to report with standard shipping.

In the box

  • 1 long-term alpha-track test device, sealed, with serial and activation code
  • Prepaid, tracked return mailer
  • Instruction card with the placement diagram
  • Reminders when the minimum exposure is reached
  • Laboratory analysis and your report online, with PDF download

Best for

  • Your yearly average
  • Following up a result between 2 and 4 pCi/L
  • Deciding whether to mitigate

Specifications

Test typeLong-term, alpha track
Test length91 days to 12 months
MeasuresRadon in air, reported in pCi/L with the laboratory’s uncertainty and detection limit
ReportOnline in My Tests, usually within 2 business days of the lab logging the sample in. PDF download. Share links.
LaboratoryIndependent analytical laboratory
Sample returnPrepaid, tracked mailer. The lab accepts a device up to 30 days after the stop time.
Use by18 months from shipment, printed on the box. We don’t analyze expired devices; we replace them.
ShippingStandard 3 to 5 business days, $5.95; free over $75. Expedited 2 business days, $14.95.

About this kit

An alpha-track detector that stays in place for 91 days to 12 months. Radon rises and falls with weather and heating, so a long-term result is the best basis for a decision about mitigation.

Timeline

  1. Delivery, standard3 days to 6 daysKits leave within one business day of your order.
  2. Measurement91 days to 365 days91 days minimum; up to a year for the best average.
  3. Sample return by mail2 days to 5 daysPrepaid and tracked. Mail it the day you stop the test.
  4. Laboratory processing3 days to 4 daysUsually 2 business days after the lab logs the sample in.

About 99 to 380 days from order to report.

How to test

  1. Register the kit by scanning the code on the box or entering the serial and activation code.
  2. No closed-house conditions needed. Live normally.
  3. Place the device on the lowest level you live in, 20 inches or more off the floor, away from drafts, kitchens, and bathrooms.
  4. Open it and log the start time in My Tests.
  5. After 91 days or more, close it, log the stop time, and mail it the same day.
  6. Read your report when we tell you it is ready.

Placement guide with the diagram

Questions

How accurate is this test?

The laboratory reports every result with its measurement uncertainty and detection limit. Radon varies by day and season, so the EPA asks for a second test before mitigating on a short-term result at or above 4 pCi/L, and recommends a long-term test for the yearly average.

What if I mail it late?

The lab accepts a device up to 30 days after the stop time. Past that it cannot be analyzed; we send a replacement at no charge the first time.

Is the lab fee really included?

Yes. The price covers the device, analysis, return postage, reminders, and your report. Nothing to pay when you mail the sample.

Can I share the report?

Yes. Every report has a PDF download and a share link that is read-only and revocable.