Signs that you might benefit from a dehumidifier include condensation on windows, a musty odor, visible mold spots, or if you live in an area with high humidity levels.

The size will depend on the square footage of the area you wish to dehumidify and the existing humidity level. Most units are classified by the point of moisture they can remove in a day. It is recommended to use a larger-capacity dehumidifier for spaces with high humidity or significant moisture problems. In daily life, you can consider using a hygrometer to accurately measure humidity levels.

To effectively maintain your dehumidifier and ensure its efficiency and longevity, follow these guidelines.
Start with regular maintenance tasks. First, clean the filter every 1-2 weeks. Remove the filter and rinse it under running water, allowing it to dry completely before reinserting it. It's also essential to empty the water tank daily or as needed, especially if your dehumidifier lacks an auto shut-off feature, to prevent overflow. Monthly, check for dust and debris by vacuuming or wiping down the exterior and the air intake and outlet grills, which will help improve airflow.
When it comes to seasonal maintenance, perform a deep cleaning at the start of the humid season. This involves removing the water tank, filter, and any other removable parts, cleaning them with mild soap and water. If you plan to store the dehumidifier during winter, ensure thorough cleaning and drying of all parts before placing it in a cool, dry location, ideally covered to prevent dust from accumulating.