Basement dehumidifiers are useful machines which reduce the amount of moisture in the air. Dehumidifiers improve the quality of the air, reduce moisture, attract less insects, lower your energy bills, and they are convenient.
When picking a dehumidifier you must understand that there are two types. These are separated by size and function. The sizes are portable and an entire house unit. Portable models can be moved from basement to bedroom or anywhere its needed. Whole house models are installed and stay in one area. Whole house units have a fan that pulls more air over coils which pulls more moisture out of the air. The portable units are not equipped with enough power to affect larger areas, so they are only useful for one room.
Depending on your needs, you should choose the right unit for your space.