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What is An Espresso Machine Group Head?
A grouphead is the part of an espresso machine that the coffee handle, or portafilter, attaches to. It is a very important aspect of an espresso machine as it has a huge impact on the quality of espresso shots. This is because it effects the brew temperature and brew temperature has a huge impact on flavor. For best results, coffee extracts best in a narrow range of temperature. If the grouphead doesn’t get hot enough or gets too hot or fluctuates in temperature it will have an adverse effect on the flavor of the espresso being brewed. The best espresso machines on the market have group heads that contain a lot of metal and have water flowing through channels in the metal to keep the group head temperature stable. Other machines use electronic grouphead heaters that do work, but not as well.