An electric air dehumidifier removes excess moisture from the air to prevent mold, mildew, and humidity-related issues. It improves air quality, reduces allergens, and helps protect furniture and walls from moisture damage. Ideal for homes, basements, and offices, it comes in various types, including compressor-based, desiccant, and thermoelectric models. Key features include adjustable humidity settings, auto shut-off, drainage options, and energy efficiency.