Usage

You should place a humidity meter at breathing height in the area you want to measure, away from windows, vents, […]

Humidity meters are generally accurate within about ±2% to ±5% relative humidity (RH), depending on the quality of the device

No, you don’t need a humidity meter in every room, but you should measure humidity in key areas where conditions

The best places to use a humidity meter in your home are areas where moisture levels vary or problems are

To check humidity in a basement, place a humidity meter in a central location, allow it to stabilise, and read

To measure humidity in a bedroom, place a humidity meter at breathing height in a stable location, allow it to

To test humidity in a crawl space, place a humidity meter in a central, stable location within the space, allow

You should check indoor humidity at least once a day in normal conditions, and more frequently when temperatures change, during