> For the complete documentation index, see [llms.txt](https://help.aranet.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.aranet.com/aranet-rn+/aranet-radon-plus/usage-and-measurements/where-to-place-the-device-in-a-room.md). # Where to Place the Device in a Room For accurate readings, the **Aranet Radon Plus sensor** should be placed where radon is most likely to accumulate and where people actually spend time. In homes, this is typically the **lowest regularly occupied level** (such as a basement or ground floor). Position the device **0.8–2 meters (2.5–6.5 ft)** above the floor, in an open area with normal air circulation. Avoid placing it near windows, doors, ventilation outlets, or exterior walls, as drafts and fresh air can dilute radon levels and distort measurements. Do not place the sensor in kitchens, bathrooms, or directly next to heat sources or electronic devices. A stable, central location away from direct sunlight will provide the most representative long-term radon measurements. The Aranet Radon Plus sensor should not be placed in direct sunlight or in areas with a risk of splashing the sensor with different liquids, or high-humidity environments (higher than 85%), such as your bathroom. Place the sensor in a safe place where it cannot accidentally be dropped because it isn’t drop-proof. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://help.aranet.com/aranet-rn+/aranet-radon-plus/usage-and-measurements/where-to-place-the-device-in-a-room.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.