What is the difference between a single-circuit and a dual-circuit system?
March 17, 2026
Single-circuit Dual-circuit difference HX machine Heat exchanger
Explains the technical difference between single-circuit and dual-circuit portafilter machines: A single-circuit machine uses one boiler for both functions (alternating between them), while a dual-circuit machine routes fresh water through a heat exchanger in the steam boiler.
A single-circuit machine has only one boiler, which is used alternately for brewing and steaming—it cannot do both at the same time. A dual-circuit machine also uses only one boiler, but routes the brewing water through a separate heat exchanger, allowing for simultaneous brewing and steaming.