Why not buy a portable or a console humidifier?
These only serve one room or a small area, and they are messy due to frequent cleanings. It is also very inconvienent to fill them everyday, not to mention the possible spills that could occur, and they take up your living space. Whole house humidifiers are actually less expensive to maintain and operate. One unit does the whole home vs. several portables, and they last as long as a furnace. There are no expensive cleaners, tablets, or treatments to prevent mold from growing inside.
