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Single Boiler Espresso Machines - What Are They and Which Ones Are Good? [Test List]
Benjamin Hohlmann
Over the past years, we have tested numerous espresso machines from all categories and areas. Including many retention espresso machines. You can find the list of espresso machines we have tested so far below. If you would like us to test an espresso machine, please don't hesitate to comment.
We set ourselves no less of a task than to test all available espresso machines on the market. This is an enormous undertaking and we will never be finished. But the fascination and your support as a community drive us on.
Here you can read what else we have tested.
| Manufacturer | Machine Name | Technology | Status | Article (Blog) / Video |
|---|---|---|---|---|
| Gaggia | Classic E24 | retention | — | |
| Lelit | Viktoria PL91T | retention | Article and Video | |
| Profitec | Go | retention | Article and Video | |
| Quick Mill | Carola | retention | Article and Video | |
| Rancilio | Silvia | retention | Article and Video |
What is a retention espresso machine?
A circle that gives the machine its name runs through the espresso machine. This is a boiler that provides the water for brewing the espresso. If the retention machine also has a steam wand, the temperature of the boiler must be increased to produce steam pressure.
To make a cappuccino or latte macchiato, you switch to milk foam mode after brewing the espresso. Depending on the machine, it then takes a few seconds to a minute before the boiler is at full power.
With retention machines, it is generally not possible to steam milk parallel to pulling espresso. If you like to use a lot of milk foam, you are usually better off with a dual boiler machine. A dual boiler allows simultaneous steaming and espresso extraction.
Wishlist: These retention machines we still want to test
The following list shows retention espresso machines that we would like to test. Do you have any other suggestions or wishes? Feel free to write to us in the comments!
| Manufacturer | Machine | Notes |
|---|---|---|
| Bezzera | Hobby | — |
| Bezzera | BZ09 | — |
| ECM | Casa V | — |
| ECM | Classica PID | — |
| ECM | Puristika | — |
| Lelit | Glenda | — |
| Lelit | Grace | — |
| Lelit | Anna | — |
| Quick Mill | Pippa | — |
| Quick Mill | 0820 | — |
| Vibiemme | Domobar | — |
Frequently Asked Questions About retention Espresso Machines
How long does it take for a retention machine to heat up?
Depending on the boiler size and heating power, most machines need between 10 and 20 minutes to reach full temperature stability.
Can I make a cappuccino with a retention machine?
Yes, absolutely. However, after pulling the espresso, you have to press a button or switch to heat the water in the boiler to steam temperature. This usually takes 30 to 60 seconds.
What is the advantage over a dual boiler machine?
retention machines are usually cheaper, more compact, and often more temperature stable when pulling pure espresso, since the brewing water comes directly from the boiler and is not heated through a heat exchanger.
This list is intended as a supplement. Please comment your wishes and suggestions. Which retention machines should we test next?
