A grouphead (or group head) is the receiver for the removable portafilter (or group handle). A typical consumer espresso machine normally has only one grouphead, while popular professional machines, such as those used at commercial coffee shops, can contain anywhere from one to seven. During the process of extracting a shot of espresso, hot water is forced through the grouphead under pressure. The grouphead contains many holes (the shower) that attempt to distribute the pressurised water evenly over the surface of the grinds in the portafilter basket and thereby achieve an even cross sectional flow.
"My absolute love of the Delonghi Maginfica ESAM3300 is hard to describe. It has been a faithful crema steeped friend and morning ritual for at least 8 years, and the current unit I bought as a replacement last week (another ESAM3300) is a testament to why I give this well built Italian Stallion "super automatic" espresso dream machine a SOLID 5 star rating.
Before we get into the technical aspects of the two types of espresso machines, here’s what you really need to know. Semi-automatic espresso machines are going to be perfect for the espresso connoisseur. If you’re the type that really wants to get the best-quality and taste out of your espresso machine and don’t mind taking a little more time and effort out of your schedule, the semi-automatic espresso maker is going to be for you. It’s a little bit more work, but the key here is that you ultimately have more control over every subtle nuance that goes into your version of the perfect shot of espresso with a semi-automatic.
Although it's very easy to use — you just fill the portafilter with grounds, attach it to the machine, and press the button to start — The Gaggia Classic isn't as flexible or intuitive as the Breville Barista Express. The user manual is less detailed, too, so you have to have a basic idea of what you're doing or browse the internet for tips. The machine has a one-year warranty if you run into problems.
What Amazon users have to say: As you may expect, there are rave reviews for Nespresso. Users love the ease of making quality espresso with little to no effort or cleanup. The machine is energy and space-saving, and comes with top notch customer service should you need it. Amazon user LT was especially feelin' it, saying "If I could marry an appliance (is it legal?) I would spend the rest of my life with this espresso machine." We'll be sure to look into those marriage laws. In the meantime, here's more Inissia praise:
Conceptually, MistoBox splits the difference between many other coffee subscriptions—and it's our best coffee subscription box because of it. The company doesn't roast its own beans, but instead sources them from top roasters all across America, who ship the fresh-roasted coffee direct to your door. It doesn't ask you to participate in blind tastings, and it doesn't give you a detailed quiz up front. It's all about balance.
In recent years air-pump-driven espresso machines have emerged. These machines use compressed air to force the hot water through the coffee grounds. The hot water is typically added from a kettle or a thermo flask. The compressed air comes from either a hand-pump, N2 or CO2 cartridges or an electric compressor. One of the advantages of the air-pump-driven machines is that they are much smaller and lighter than electric machines. They are often handheld and portable. The first air-pump-driven machine was the AeroPress, which was invented by Alan Adler, an American inventor, and introduced in 2005. Handpresso Wild, invented by Nielsen Innovation SARL, a French innovation house, was introduced in 2007.
An evenly tamped shot requires the tamp to fit into its portafilter basket precisely. Each machine comes with its own tamp, so we were surprised to find that not all of them fit. Some were too small, leaving behind a crescent moon of untouched coffee. It’s possible to try and compress in sections, but you’ll run the risk of re-tamping some of the grounds and producing an unpalatable shot.
Programmable coffee makers exist to make the brewing process as painless as possible. Outside of maybe grinding your coffee beans, the drip coffee system will use optimal water temperatures of around 205 degrees Fahrenheit or 96.11 degrees Celsius for maximum extraction of the ground coffee beans. The best automatic coffee maker will seamlessly reach this temperature within minutes of the brewing process.
CR’s take: The Cuisinart Coffee on Demand is a self-serve model. It stores 12 cups of brewed coffee in a reservoir and has a dispenser instead of a carafe. It makes sense in homes where people are drinking coffee at different times; it keeps coffee hot and ready, so family and guests can fill their own cups. This model is programmable and features a water filter and a cleaning indicator. The reservoir can be removed for washing. In our tests, the Coffee on Demand performs quite well, receiving a Very Good rating for convenience. At less than $100, it can be a terrific choice for entertaining.