The Ona Odor Stop dispenser ON10049 is an excellent dispenser fan for medium duty applications. It has a high volume of airflow and a profile that can be conveniently placed anywhere odor neutralization is required up to 10,000 square feet. The Ona Odor Stop dispenser has two 4-inch ports to facilitate installation in a ventilation system. The Odor Stop dispenser features a variable fan speed controller to distribute the gel up to 225-cubic feet per minute (CFM). It is designed for the 1-gallon jar, which will last for 4-6 weeks.