Espresso Machines - How to Choose the Right Espresso Machine for You Espresso machines heat the water to near boiling point before forcing it through finely ground coffee packed tightly into a portafilter. This produces a concentrated espresso. Many models let you regulate important espresso variables like temperature and pressurization. https://www-coffeee-uk06337.glifeblog.com/29181945/you-can-explain-best-home-espresso-machine-to-your-mom