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Heat exchanger espresso machines

12 machines in the database, from $863 to $2,931 — every spec source-checked.

A heat exchanger (HX) machine has one steam boiler with a tube running through it that flash-heats brew water on demand. That means you can brew and steam simultaneously, without paying for two boilers.

HX machines — often built around the E61 group — sit between single and dual boilers in price. Brew temperature is managed with a cooling flush rather than a dial, which some owners enjoy and others would rather skip.

MachineTypeBoilerPIDGroupPriceCompare
Nuova Simonelli Oscar II Heat exchanger heat exchanger (2.0L) — 58mm commercial $863
Bezzera BZ10 Heat exchanger heat exchanger 1.5L — electrically heated group $1,186
Lelit MaraX V2 (PL62X) Heat exchanger HX 1.8L Yes E61 $1,296
Lelit Mara PL62 Heat exchanger heat exchanger 1.4L — E61 $1,404
Rocket Espresso Appartamento Heat exchanger HX 1.8L — E61 $1,620
Profitec Pro 500 PID Heat exchanger heat exchanger 2.0L Yes E61 $1,727
Bezzera Magica PID Heat exchanger heat exchanger 2.0L Yes E61 $1,835
Rocket Espresso Mozzafiato Cronometro R Heat exchanger heat exchanger 1.8L Yes E61 $2,029
Rocket Espresso Giotto Cronometro R Heat exchanger heat exchanger 1.8L Yes E61 $2,047
ECM Mechanika VI Slim Heat exchanger heat exchanger ~2.2L Yes E61 $2,051
ECM Technika V Profi PID Heat exchanger heat exchanger 2.1L Yes E61 $2,591
Nuova Simonelli Musica Heat exchanger Insulated 2 L copper heat exchanger — $2,931

Care & maintenance

Scale inside the narrow heat-exchanger tube is the classic HX failure, so water quality matters more than on any other type — many owners run these on filtered or bottled water only. The E61 group wants regular detergent backflushes and occasional lubrication of the cam.

How this works: read the explainer →
Buying guide: Best heat exchanger espresso machines →
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