Villa 3000The Villa 3000 is designed for larger spaces such as homes, condos, and offices. This model has a variable ozone output control and a 12 Hour Timer that turns off automatically when the treatment is completed. For deeply entrenched odors, there is also a Hold setting for treatment longer than 12 hours until the machine is turned off manually. A good selection for medium houses, large apartments, offices, rental properties, locker rooms, restaurants,