How a Coffee Espresso Machine Works Understanding how complex devices function can make them easier to understand and appreciate. You can also decide which device is right for you. Pressure and temperature of water are two important aspects in espresso machines. Water should be between 195 and 204 degrees Fahrenheit https://coffeee-uk71798.59bloggers.com/30244704/why-you-should-be-working-on-this-coffee-espresso-machine