Coffee and Espresso Machines Espresso machines use pressure in order to press water into finely crushed and tamped beans. They create a rich, tasty brew. Good Housekeeping Institute experts recommend models that brew at 9 bars minimum to ensure an ideal extraction. Beware of brands that advertise greater pressure than https://www.coffeee.uk/products/gaggia-deluxe-coffee-machine-1850-w-15-bar