Anyone entering the world of espresso will quickly come across three main types of machines: single-boiler, dual-boiler, and dual-boiler. Each model has its own strengths—and the choice largely depends on how and how often you prepare coffee.
1. Single-circuit – compact & affordable
In a single-circuit machine, a single boiler is responsible for both bringing water to brewing temperature for espresso and generating steam for frothing milk.
This means you have to switch between espresso and steam mode, which takes a few seconds to minutes until the right temperature is reached.
Advantages:
- Compact design
- Low price
- Energy efficient
Suitable for:
Coffee drinkers who primarily enjoy espresso or Americano and only occasionally prepare milk drinks. Ideal for beginners on a budget or with limited kitchen space.
2. Dual circuit – espresso and steam at the same time
A dual-circuit machine has only one boiler, but two separate water circuits: one for the brewing water (via a heat exchanger) and one for steam. This allows you to brew espresso and froth milk without waiting.
Advantages:
- Parallel preparation of espresso & milk foam
- Robust technology
- Usually ready for operation faster than a single-circuit system
Suitable for:
Latte macchiato and cappuccino fans who often prepare several drinks in a row. Perfect for households where milk drinks are part of everyday life, but a high-end budget isn't available.
3. Dual boiler – maximum control
The dual boiler has two separate boilers: one for the brewing water and one for the steam. Both can be independently controlled in terms of temperature and pressure – often even to the exact degree.
Advantages:
- Highest temperature stability
- Individual setting options
- Parallel work without compromises
Suitable for:
Ambitious home baristas and professionals who value absolute precision. Ideal for adventurous coffee lovers who want to explore different bean profiles and often prepare multiple drinks.
Conclusion:
Single-boiler machines score points for simplicity and affordability, dual-boiler machines for speed and convenience, and dual-boiler machines for precision and performance. The right choice depends on how often you make milk-based beverages, how important temperature control is to you—and, of course, your budget.
