Thermoblock espresso machines are similar to single boiler espresso machines. Both can make espresso shots back to back. Both have a wait time when switching from coffee mode to steam mode (except lever models). The main difference is thermoblocks flash heat the incoming water so the wait time will be shorter. We at 1st-line Equipment, personally handpick the thermoblock espresso machine models we carry. We evaluate each model on a number of factors. Not totally sure if you want to purchase a thermoblock? Then check out the other types of espresso machines we have to offer!