Which radon monitor should I buy for ongoing monitoring?

What's happening

Radon levels in a home can vary by season and weather -- a single short-term test only captures one window of time, which is why some households want an ongoing reading instead of, or in addition to, a one-time result.

Why it matters

The EPA's guidance (see Interpreting a Radon Test Result) is built around a single test result, but a level that was borderline in one season could be different in another. Continuous monitoring is how a household gets visibility into that variation rather than relying on one 48-hour snapshot.

What kind of solution

A continuous radon monitor is a standing device, usually battery-powered and app-connected, that keeps measuring rather than producing one lab result. It's the natural next step after an initial short-term test, particularly if that first result was elevated or borderline, or if you simply want ongoing visibility without repeat lab fees.

Next step

Compare the radon detectors and tests covered by this site, or go directly to the Airthings Wave Radon review if you already know you want a continuous monitor.