The Hotel 350 is designed for smaller spaces such as hotel rooms, rental cars, and small boats. This model has a variable output and a 60 minute timer that will turn the unit off automatically when the sanitizing is completed. The typical hotel or motel room can normally be treated in 15-30 minutes. There is also a “Hold” selection on the timer so the space can be sanitized for extended periods in order to eliminate deeply ingrained odors.