Fellow Espresso Series 1 Espresso MachineWhat is it? The Fellow Espresso Series 1 is Fellow's first espresso machine, and it's a statement piece. Built around a patented Boosted Boiler architecture with three independent heating elements (boiler, flow through heater, and group head heater), it achieves excellent thermal stability and near instant transitions between brewing and steaming. The commercial style 58mm group head with brass core and water dispersion block ensures consistent