The Timed Entryway Foam Sanitizer is an automated foam applicator for the prevention of cross contamination in your facility. When activated, it projects santizing chemical foam from the discharge hose and Spreader™ nozzle on to 6' double doors. The venturi injection system uses city water pressure (35 - 125 PSI) to draw and blend chemical concentrate into the water stream to create an accurately diluted solution. Clinging foam is created by injecting compressed air into the solution to greatly increase volume and coverage ability.. The system timer can be programmed by the user to ensure it meets your schedule criteria.