How a Coffee Espresso Machine Works Understanding how complex devices work will make them easier to use and appreciate. It can also help you decide which one is right for you. Two key espresso machine factors are water temperature and pressure. Water should be between 195 and 204 degrees Fahrenheit https://coffeee77535.newsbloger.com/30346478/everything-you-need-to-learn-about-coffee-espresso-machine