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Dual boiler
A machine with two completely separate boilers — one for brewing, one for steaming — each with its own element and thermostat/PID.
Category: Boilers & Heating
An espresso machine architecture with two separate boilers — one for brewing, one for steaming — each held at its own temperature.
Why it matters — Dual boilers eliminate the trade-offs of single-boiler and HX designs. You can brew and steam simultaneously, and temperatures stay stable shot-to-shot without cooling flushes or wait times.
Good to know
- The most flexible and stable architecture for serious home or commercial use.
- Trade-off is size, weight, and price — dual-boiler machines are bigger and more expensive than single or HX equivalents.