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- The Breville uses a knob. > Boiler(s) – Mini Vivaldi - Steam boiler: 1.2 liters with 1250 watt heating element, Brew boiler: 0.45 liters with 800 watt heating element. The boilers are copper with coating to prevent leaching. The BES920XL has two boilers as well. The steam boiler is 0.95 liters and the brew boiler is 0.3 liters.
- Sep 19, 2019 · A heat exchanger uses some tubing that runs through the steam boiler in an espresso machine to rapidly heat water from room temperature to water ideal for brewing. Dual boiler machines have dedicated boilers for specifically espresso and steaming milk.
- Sep 17, 2020 · The Breville BES920XL is one of the very few espresso machines that features a separate steam boiler. You can froth milk and brew your coffee at the same time. There’s also a fully articulated stainless-steel steam wand. The wand has a rubber-padded holder, which prevents you from burning your hand, a common problem with steam wands.