Note that whole-house console humidifiers are often heavy and can't be moved as freely. However, some models feature rolling casters to help you transport the unit from spot to spot for better humidity coverage. Console models are also available in a range of designs that attractively disguise them as furniture. In-duct humidifiers, also known as furnace humidifiers, are conveniently installed out of sight, saving space. Keep in mind, however, that you might need to consult an HVAC technician when installing one in your home.