The Bunn 12-Cup Pourover Commercial Coffee Brewer with 2 Warmers uses a patented brewing system with a reservoir to hold water at the optimum brewing temperature and a spray head that showers hot water over the ground coffee, floating the grounds in the filter for even extraction and optimal flavor.. 2 separately controlled warmers. Brews into 2 Bunn commercial regular or decaf decanters (models 6100 or 6101, which are not included). No plumbing required, as coffee brews when cold water is poured in the top. Stainless-steel internal components. Black and stainless-steel finish. Spray head dispenses water evenly over coffee grounds for maximum flavor. Commercially rated unit brews up to 3.8 gallons of coffee per hour