The Bunn CWTF 4/2 Twin Automatic Coffee Brewer has 2 Lower Warmers and 4 Upper Warmers. This twin brew head system can make up to 15 gallons of coffee an hour. So for your 8 hour work day, that s 120 gallons of coffee to keep you going. Each warmer is individually controlled on the CWTF 4/2 Twin. Medium volume, twin brew head systems. Brews 10.3 to 13.7 gallons of perfect coffee per hour. Four or six individually controlled warming stations. All stainless steel construction. Includes hot water faucet. Pourover feature on both sides. &l.