The Bunn HT Phase Brew is different than other drip coffee makers. Unlike ordinary machines, the Phase Brew doesn t "drip" right away. In fact, it doesn t drip at all. That s because the revolutionary Heat & Release Technology heats all the water to the right temperature during the 6-minute heating phase, then quickly releases it through the unique sprayhead for an optimal 4-minute brewing phase and amazing coffee flavor. Bunn Phase Brew - Brews better, not bitter. This is the high altitude version. Stainless steel thermal carafe keep brewed coffee hot for hours. Revolutionary, patent-pending Heat & Release Technology heats water to about 2.