Basement Waterproofing - Improper dehumidifier

Many people have these kinds of dehumidifiers in their basements. They are readily available at most hardware stores, but just how good are they? Think about the size of most basements, they are usually massive. Many times a basement is the entire floor plan of the home above, just without the walls. These little dehumidifiers just aren't strong enough to handle that whole space. That means you would need 3 or 4 to even attempt to do the job of a whole house machine like the SaniDry CX. They use more power and do less work, doesn't make a lot of sense.