Home espresso machines: the types and what to look for
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The short answer
A home espresso machine pushes hot water through finely ground coffee under pressure. Machines differ in how much you do by hand (manual, semi-automatic or super-automatic) and in how they heat water (single boiler, heat exchanger or dual boiler). Start by deciding how much of the process you want to control. 1
What an espresso machine does
An espresso machine forces hot water through packed, finely ground coffee. Wikipedia says these machines "may be manual, semi-automatic, or fully automatic in operation." 1
Wikipedia says pump-driven machines can "accept water directly from a cold water line supply" or "from a separate tank that must be filled with water by hand," and that the tank is "more common with lower-volume commercial installations and domestic espresso machines." 1
Check the maker's page to see whether a model uses a tank, and how big it is.
Manual, semi-automatic and super-automatic
This is the biggest choice, because it decides how much work each cup takes.
Manual (lever) machines. You work a lever to push water through the coffee. Wikipedia says lever machines "are sometimes called manual espresso machines." In a spring piston design, the spring usually delivers "8 to 10 bar; 116 to 145 psi." 1
Semi-automatic machines. Wikipedia says a portafilter "attaches to the grouphead of semi-automatic and piston-driven espresso machines." The portafilter is the handle that holds the ground coffee. Check the maker's manual for which steps the machine does for you. 1
Super-automatic machines. Wikipedia describes them as having "mechanisms for automating the entire process, such that a shot of espresso may be produced by a single touch from the user." Wikipedia adds that a machine "may even incorporate a built-in coffee grinder." 1
The more of the process a machine automates, the less you do by hand.
Single boiler, heat exchanger or dual boiler
Brewing and steaming milk need different water temperatures. How a machine handles both is a key spec to check.
Single boiler, dual use. One chamber does both jobs, so the machine "can perform only one operation at a time." You wait between pulling a shot and steaming milk. Wikipedia says these are "generally found within the lower tiers of enthusiast home models." 1
Heat exchanger (HX). The boiler stays at steaming temperature, and brewing water passes through a heat exchanger. This type "requires a cooling flush of 4–6 seconds prior to the first espresso pull." 1
Dual boiler. Brewing water is heated in a separate chamber. Wikipedia says "true DB machines provide stable brew temperatures and fast steaming, but are larger and more expensive." 1
Wikipedia also mentions machines with "a boiler for brewing and a separate thermoblock (TB) for heating brew water to steaming temperature." Check the maker's spec sheet to see which design a model uses. 1
A real example: the Breville Barista Pro
The Breville Barista Pro shows what a built-in grinder machine lists on its page. Breville describes "low pressure pre-infusion followed by 9 bar extraction" and an "integrated conical burr grinder with 30 grind settings." 2
The price on breville.com was US$849.95 on 3 November 2026, in US dollars. Prices change, and Breville may run sales, so check the page before you buy. 2
We haven't used this machine. It's here only to show the kind of specs worth comparing: pressure and grinder settings. For more models, see our look at the Breville espresso machine range.
What to compare before you buy
Use this short list on any machine's product page.
- How much is automatic. Manual, semi-automatic or super-automatic. - Boiler design. Single boiler, heat exchanger, dual boiler or thermoblock. Ask whether you can brew and steam at once. - Built-in grinder. Some machines include one. Others need a separate grinder. - Water tank or plumbed in. Check which the machine uses and how big the tank is. - Price, dated. Compare the maker's price on the same day, in the same currency. - Care. Follow the maker's manual for cleaning and descaling. Don't open the machine yourself.
Frequently asked questions
What is the difference between a semi-automatic and a super-automatic espresso machine?
Check your model's manual for which steps you do yourself. Wikipedia says a super-automatic has "mechanisms for automating the entire process, such that a shot of espresso may be produced by a single touch from the user." 1
Do I need a dual boiler machine?
Not necessarily. Wikipedia says true dual boiler machines "provide stable brew temperatures and fast steaming, but are larger and more expensive." Whether that's worth it depends on how much milk you steam. 1
How do I clean my Breville espresso machine?
Follow the cleaning and descaling steps in the manual that came with your model, and use the products Breville names. Don't open the machine.
Can I make espresso without a machine?
This page is about machines, so it doesn't cover methods without one. Wikipedia says lever machines use "a lever, pumped by the operator, to pressurize hot water and send it through the coffee grounds." 1
Sources
- Espresso machine, Wikipedia. Checked 3 November 2026.
- Barista Pro - Fast Espresso Machine, Breville. Checked 3 November 2026.