Some machines use a single boiler kept at steaming temperature, but water for brewing is passed through a heat exchanger, taking some heat from the steam without rising to the same temperature. Although the water for brewing remains at a lower range than that required for steaming milk, it is still too hot for proper coffee extraction without first cooling; thus this type of machine requires a cooling flush of 4–6 seconds prior to the first espresso pull. Once the machine is dialed into the proper temperature, as many shots can be pulled as required without refreshing. However, if the user leaves the machine idle again for some period, the flushing process will need to be repeated. The HX variety is found in many mid-range machines and many users install thermometers to assist them is dialing in correct temperatures. There is some controversy as to the temperature stability of the brewing water, since it is indirectly converted from steaming temperature to brewing temperature, rather than kept at a brewing temperature.
If you're ready to pull the trigger on buying an espresso machine, be prepared to shell out a little cash. Espresso machines can be wildly expensive. Rightfully so. Pulling a perfect shot requires precision: the machine must maintain both precise temperature and stable pressure throughout the brewing process. Achieving this stability is difficult and requires complex machinery, which is why you can find machines for upwards of 6,000 dollars.
The Hamilton Beach 12-Cup BrewStation coffee maker offers convenient one-hand dispensing without a conventional glass carafe. There's no pouring or spills, and nothing fragile to break and replace. It’s impossible to get freshly brewed flavor from coffee that’s been sitting on a hot plate too long. That’s why the Hamilton Beach BrewStation was created to be the only coffeemaker that keeps coffee tasting fresh for up to four hours. This best-selling coffee maker works just like a...
From 1-cup coffee makers to 60-cup coffee urns, automatic drip coffee makers to french press coffee makers, we design and expertly engineer our coffee machines to fit your lifestyle and brew a perfect cup of coffee, every time. Some of our coffee innovations include our FlexBrew® coffee makers, designed to let you drink a cup of coffee from a single-serve pack or from coffee grounds, in a single cup or a 12-cup carafe. Our collection of BrewStation® coffee makers ignore the carafe completely and internalize the brewing system, allowing you to pour a fresh cup of coffee with one-hand. Other innovations like easy access filling, programmable settings, and automatic grounds filling make our coffee makers uniquely qualified to improve your every morning. 
For many of us, the daily grind can't begin until we've had that first cup of piping hot coffee—so the right brewer is at the top of the list. The most basic coffee makers make at least a decent cup, but a little more money buys conveniences such as programmability, a thermal carafe to keep coffee hot longer, settings that let you adjust brew strength, and more.
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