How To Decide Which Machine is Right For Home Brewing Espresso
Home espresso machines may produce the same delicious beverages but mechanics involved can vary from one machine to next. Two popular types of that extract and steam milk at time are dual boiler heat exchanger machines. Here we explain how these home compare contrast.
The Boiler(s)As the name suggests – dual boiler espresso machines have two boilers, whereas a heat exchanger machine only has one. This is the most obvious difference between the two types of machines, yet both can produce the very high temperatures needed for steam and the below boiling temperatures needed for quality espresso.
A heat exchanger espresso machine like the Appartamento from Rocket keeps the water in the boiler at temperatures high enough to create steam, roughly 255 – 265 F. The steam boiler is half filled with water and has a heat exchange tube inside where water from the reservoir is fed into and flash heated before channeling it into the group to make the coffee. The steam valve above the water and heat exchange tube is where steam is pulled from to create steam and make your milk-based drinks. Heat exchange machines require cooling flushes to be done when the machine sits idle for a period of time, which is not the case for dual boiler machines.