Dual boiler espresso machines
Buy Heat Exchanger (HX) Espresso Machines in Switzerland – the Sweet Spot for Home Baristas
A heat exchanger (HX) machine has a single boiler that stores hot water for steam generation – at 120 to 130 °C. A second, smaller water circuit runs through this boiler: a thin tube through which fresh cold water flows, heating up to brewing temperature (approx. 90–94 °C) as it passes through. Hence the name "heat exchanger".
In practice, this means: you can pull espresso and steam milk simultaneously, without having to wait for a second boiler. The workflow is almost identical to a dual boiler machine – only the brewing temperature is slightly less precisely controllable than with two separate boilers. For most beans and workflows, this is perfectly sufficient.
For decades, the HX has been the sweet spot for demanding home baristas: it offers 80% of professional functionality with a significantly smaller footprint and price. Coffee Coaching Club carries the complete HX cluster from Italy, Germany, and Switzerland – from the entry-level Lelit Anna to the Swiss Olympia Maximatic.
Heat Exchanger vs. Single Boiler vs. Dual Boiler
| Design | Boiler | Workflow | Price |
|---|---|---|---|
| Single Boiler | 1 boiler, 1 water circuit | Brewing and steaming consecutively, waiting when switching | affordable, compact |
| Heat Exchanger / HX | 1 boiler, 2 water flows | Simultaneous brewing and steaming, approx. 90–94 °C brewing water via heat exchanger | mid-range price |
| Dual Boiler | 2 boilers, separately temperature-controlled | Simultaneous, higher temperature precision, PID per circuit | higher, professional level |
The Brands in the Cluster
Lelit (Castel Goffredo, Italy)
The most accessible Italian brand. Five active HX models at CCC:
- Anna PL 41 EM (CHF 569) – most affordable entry-level
- Anna PL 41 TEM (CHF 679) – with thermometer temperature display
- Glenda PL 41 PLUS (CHF 779) – extended Anna variant with toggle valve
- Mara X (CHF 1,429, multiple colors) – the best-selling HX machine in the prosumer segment in recent years. Compact, PID-controlled, E61, popular with specialty-coffee-minded home baristas
- PL 62-W (CHF 1,439) – compact HX with classic controls
Rocket Espresso (Milan)
The Appartamento TCA is Rocket's HX bestseller. Stainless steel construction, classic design, in various color variants:
- Appartamento TCA in stainless steel-white, stainless steel-copper, stainless steel-black (all CHF 1,639)
- Appartamento TCA in black-copper and matte black (both CHF 1,689)
- Appartamento TCA with wooden elements (CHF 2,189)
- Giotto Cronometro V (CHF 1,899) and Mozzafiato Cronometro V (CHF 1,959) with volumetric function
- Giotto FAST R/V and Mozzafiato FAST R/V (CHF 1,989 each) – fast heat-up mode
- Giotto Cronometro R and Mozzafiato Cronometro R (CHF 2,299) with rotary pump
- Mozzafiato Cronometro R Black (CHF 2,299)
Bezzera (Milan, since 1901)
Probably the widest HX selection on the market. Active models:
- BZ10 VT5 (CHF 1,699) – entry-level HX with toggle valves
- Crema DE/PID Rosewood (CHF 1,979) – subtle design with plumb-in option
- Magica PID VT9 (CHF 1,999) – the Bezzera HX classic
- ARIA Top PID closed stainless steel casing (CHF 2,089) and Square Black/Wood (CHF 2,278)
- Mitica Tank Kipp VT5 (CHF 2,089)
- BZ16 DE Top with rotary pump (CHF 2,599)
Classic E61 brew group, stainless steel, good value for money. "DE" suffix means plumb-in connection option.
ECM (Heidelberg, Germany)
Three active HX models:
- Mechanika VI Slim (CHF 1,979) – German classic
- Mechanika VI Slim Heritage Line anthracite with copper accents (CHF 2,089)
- Mechanika VI Slim PID Exclusive Line with shot timer (CHF 2,149)
- Mechanika MAX (CHF 2,489) – with Smart HX® and PID
German prosumer quality, classic design, component sourcing from established industrial suppliers.
Profitec (Heidelberg, sister brand of ECM)
Two active HX models:
- PRO 400 (CHF 1,649) – compact HX class
- Pro 500 QS (CHF 1,889) – mid-range HX with PID
Strong design, German manufacturing, classic Italian look.
Torre (Italy)
Italian premium forge with three active HX models:
- Luigino Cool Touch with ERGOLIFT™ (CHF 1,749)
- Luigino TSP Total Black with rotary pump and Smart PID (CHF 2,159)
- Teresina RS with rotary pump and ERGOLIFT™ (CHF 2,449)
Design-strong alternative with a distinctive construction character.
Eureka (Florence, since 1920)
Eureka is primarily a grinder manufacturer, but also offers its own HX espresso machine, the Costanza R (CHF 1,999). Italian design, classic E61 brew group.
Olympia Express (Aargau, Switzerland)
Maximatic (CHF 3,989) is the smallest heat exchanger coffee machine in the Olympia range. Swiss manufacture since the 1950s, direct lever/semi-automatic hybrid, entirely manufactured in Switzerland. Service in Switzerland, repairability for decades.
Which HX Machine for Which Setup
| Use Case | Recommendation |
|---|---|
| Beginner home, budget under CHF 1,000 | Lelit Anna PL 41 EM/TEM, Lelit Glenda PL 41 PLUS |
| Sweet Spot Home HX CHF 1,400–2,000 | Lelit Mara X, Rocket Appartamento TCA, Profitec PRO 400 / Pro 500 QS, ECM Mechanika VI Slim, Bezzera Magica PID |
| Premium HX with rotary pump | Rocket Mozzafiato/Giotto Cronometro R, Bezzera BZ16 DE Top, Torre Luigino TSP / Teresina RS |
| Plumb-in connection | Bezzera models with "DE" suffix, Profitec Pro 500 with plumb-in option, ECM Mechanika MAX |
| Italian design with color options | Rocket Appartamento TCA (White/Copper/Black/Matte/Wood), Bezzera ARIA TOP, Lelit Mara X multiple colors |
| German manufacturing preferred | ECM Mechanika VI Slim, ECM Mechanika MAX, Profitec PRO 400/500 |
| Swiss manufacture | Olympia Express Maximatic |
| HX with volumetric function | Rocket Giotto Cronometro V, Mozzafiato Cronometro V, Profitec Pro 500 QS |
Service in Switzerland
For machines over CHF 3,000, we include a free barista workshop at our roastery. Delivery, installation, and Swiss service via CCC or directly via the manufacturer's workshops. Heylight installment payment possible. Free shipping in Switzerland and Liechtenstein from CHF 60.
Most HX models are available in the showrooms in Bern (Gerberngasse 44) and Zurich Oerlikon (Hagenholzstrasse 50b) – including direct comparison possibilities between Bezzera, Lelit, Rocket, Profitec, ECM, and Torre. Please arrange an appointment in advance.
What Goes Well With It
Suitable grinders for entry-level HX: Eureka Mignon Specialita, Lelit William, Mahlkönig X54. For premium HX: Eureka Atom 65, Mazzer Mini G, Mahlkönig E65S, Fiorenzato. For single-dosing workflow: Ceado E37Z Naked, Option-O Lagom 01, 1Zpresso K-Ultra (hand), Varia VS3. For tools: Normcore WDT and Leveler, Tamper Collection. For premium scales: Acaia Lunar. For precision baskets (58 mm): IMS Baristapro Nanotech. For milk pitchers: Motta Europa. For brewing water setup: Brita filter, Apax Labs TONIK. For cleaning: Urnex Cafiza and BioCaf. For setup organization: Flate Barista shelves. For beans from our own roastery: CCC In-House Roasts – HX machines are particularly well suited for classic espresso profiles such as Cozy Chocolate, Nutty Delight, and Creamy Chestnut.
Frequently Asked Questions
What is the difference between a Heat Exchanger and an HX?
No difference – "Zweikreiser" is the German term, "HX" (Heat Exchanger) is the international one. Both refer to the same design: one boiler, two separate water paths.
Is the extra cost for PID worth it?
With an HX, definitely: PID keeps the boiler temperature stable and thus indirectly influences the brewing temperature. Without PID, the temperature fluctuates by several degrees, which is particularly noticeable in the taste of light roasts. With Bezzera, Lelit, Rocket, Profitec, and ECM, PID is now standard in the premium segment.
What does "Cooling Flush" or "Temperature Surfing" mean?
Because HX machines draw their brewing temperature from the hot steam boiler, the water in the brew path is sometimes too hot. A "cooling flush" – i.e., briefly running water through the brew group before attaching the portafilter – lowers the temperature to the desired value. With many modern HXs (Lelit Mara X, Bezzera with PID, ECM Mechanika MAX with Smart HX®), this is less necessary because the machines maintain a more balanced temperature.
Can I connect an HX to the mains water supply?
Yes, many models have a plumb-in option – recognizable by the "DE" suffix on Bezzera, or explicitly as a variant on Profitec Pro 500 and ECM Mechanika MAX. For home setups in Switzerland, this is often unnecessary (water tank is sufficient), but practical for heavily used or office setups.
What distinguishes the Rocket Appartamento TCA from the standard Appartamento?
The standard Appartamento is not currently in CCC's active range. The Appartamento TCA is the revised variant with updated components and a wide selection of colors and materials: stainless steel in white/copper/black, black-copper combination, matte black, with wooden elements. All versions are technically identical, an aesthetic decision.
Lelit Mara X or Rocket Appartamento TCA?
Two popular sweet-spot HX machines. Mara X: Italian, compact, with Lelit PID setup and E61 brew group, very specialty-coffee-oriented. Appartamento TCA: Italian, classic Rocket design, slightly heavier, classic controls with toggle valves. Both are top, an aesthetic and workflow question.
Which Mahlkönig grinder fits the HX?
For entry-level HX (Lelit Anna, Profitec PRO 400): Eureka Mignon Specialita, Lelit William, Mahlkönig X54. For premium HX (Mara X, Rocket Cronometro R, ECM Mechanika MAX): Eureka Atom 65, Mazzer Mini G, Mahlkönig E65S, Option-O Lagom 01. For single-dosing workflow: Ceado E37Z Naked, 1Zpresso K-Ultra (hand), Varia VS3.
What is Smart HX® in the ECM Mechanika MAX?
ECM's own heat exchanger variant. Optimized to maintain brewing temperature more evenly than classic HX designs – less need for cooling flush, more stable extraction. Combined with PID for both circuits.
Why is the Olympia Maximatic so expensive in the HX segment?
The Olympia Maximatic (CHF 3,989) is a Swiss manufacture with the same design philosophy as the Olympia Cremina – repairable for decades, with Swiss service and original spare parts directly from Aargau. This reflects the small production numbers and Swiss manufacturing tradition. Functionally an HX, philosophically in a league of its own.
Can I test HX machines before buying?
Yes, in the showrooms in Bern and Zurich Oerlikon. We have the main models from Bezzera, Lelit, Rocket, Quick Mill, ECM, Profitec, Torre, and Olympia on site and can compare them directly – heated up, with your preferred beans. Please arrange an appointment in advance.
Personal Consultation: +41 76 789 15 79 · office@coffeecoachingclub.ch
Showrooms: Bern, Gerberngasse 44 | Zurich Oerlikon, Hagenholzstrasse 50b
Delivery: 2–4 working days · Click and Collect · Free shipping from CHF 60 · Heylight Financing · Barista Workshop from CHF 3,000 included
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