La Spaziale S1 Vivaldi II

The S1 Vivaldi II is a dual boiler made to be plumbed into the mains: a small boiler for coffee and a larger one for steam and hot water, working independently, so milk can be steamed while the coffee runs. It has no tank: water comes from the supply, and a direct drain can be added as an option. The buttons are programmed by volume, and pre-infusion is electronic.

A display shows the group temperature degree by degree, and a dual-scale gauge shows both boiler and pump pressure. When you only want coffee, economy mode switches off heating in the large boiler, whose temperature can also be adjusted. There is an app, S1 Timer, which also updates the firmware; a self-diagnosis system flags faults.

The portafilter is 53 mm, not the café standard: tampers and baskets have to be chosen for that size. It is for someone with a water point near the machine who wants a dual boiler that doses by itself; anyone who cannot plumb it in should look at the S1 Mini Vivaldi II, which has a tank.