How a Coffee Espresso Machine Works Understanding how complex devices work will make them easier to use and appreciate. You can also determine which device is the best one for you. Temperature and pressure of water are two key factors in espresso machines. The water temperature should be between 195 https://wwwcoffeeeuk47366.targetblogs.com/30360414/where-can-you-find-the-most-reliable-coffee-espresso-machine-information