Though some of the models we’ve reviewed have a decent coverage area, like the Vornado Evap40,  they would only work well in very small homes or apartments. If you are trying to humidify an average size house, you will likely need a larger size, like a console model or a whole-house humidifier. The consoles are a bit more portable, while the whole-house models work with the heating and cooling system of your home to add humidity to all the rooms at the same time.