Espresso Machines - How to Choose the Right Espresso Machine for You Espresso machines heat the water to near boiling point, then force it through finely ground coffee packed tightly into a portafilter. This creates a concentrated espresso. Many models let you control key espresso factors like temperature and pressure. https://www-coffeee-uk03044.bloguerosa.com/29162057/7-simple-tips-for-rocking-your-best-home-espresso-machine