Skip to content

Topic

Espresso machines

Machines with a portafilter put you in charge of grinding, dosing and tamping. The boiler type decides how quickly you can switch from brewing to steaming milk.

Common basket sizes
51, 54 and 58 mm
Double shot dose
about 14 to 20 g
Side view crop anonymous ethnic barista in apron grounding coffee into portafilter and using tamper while working in light modern cafeteria kitchen
Photo: Ketut Subiyanto on Pexels

A single boiler brews and steams from the same boiler, so you wait between the two. A heat exchanger keeps a steam boiler hot and passes brew water through it, a dual boiler has one boiler for each job, and a thermoblock or thermojet heats water on demand for a very short warm-up.

The portafilter size matters when you buy accessories: tampers, dosing funnels and baskets come in the same sizes as the group head, most often 51, 54 or 58 mm.

Some machines have a built-in grinder. That saves space, but a separate grinder can be upgraded later without replacing the machine.

Guides on this topic

Buying guides on this topic