The larger the room, the greater the output that is required to maintain the recommended humidity level. It is simply a matter of efficiency. A 1 gallon output humidifier that tried to humidify a 1000 sq. ft home would never be able to produce enough moisture to maintain the recommended humidity level of 40-50% in such a large area. In order to humidify such a large area the output would need to increase.
- Why are humidifiers rated by room size?