Ascaso Steel UNO Programmable Espresso Machine w/PID Controller, Single Thermoblock, 120V (Inox)

The Ascaso Steel UNO in Inox is brushed stainless throughout, the finish that wears in instead of wears out. Single thermoblock, PID temperature control, real 58mm portafilter, and a vintage-industrial body that holds up in a daily-use kitchen. Built in Barcelona, quiet enough for early mornings, and roughly the size of a stand mixer.

Why it works

• Single thermoblock with PID temperature control. Adjustable in one-degree increments, which is the part that matters: this isn't a "hot enough, good enough" machine, it's one you can dial in for the bean you're brewing.
• Real 58mm commercial portafilter. Walnut handle, professional baskets in traditional and pressurized sizes, ESE pod compatible without an adapter. The portafilter is the part most home machines compromise on; the UNO doesn't.
• Volumetric programming. Set single, double, and pre-infusion times once and the machine repeats them. Useful when more than one person in the house pulls shots.
• Quiet enough for early mornings. Customers consistently flag this; the UNO runs noticeably quieter than most home machines in this price band.

Specs

• Boiler design: Single thermoblock (aluminum, stainless-steel-lined)
• Temperature control: PID, adjustable in one-degree increments
• Portafilter: 58mm commercial; bottomless, pressurized, non-pressurized, and ESE pod compatible
• Programming: Single shot, double shot, pre-infusion, auto-standby
• Pump: Vibration pump with adjustable OPV
• Reservoir: 67 oz
• Warm-up to brew: 3 min 30 sec
• Wattage / voltage: 1050W / 120V
• Cup clearance: 3 in
• Dimensions: 11 1/8 W (with knob) x 12.5 D (17 with portafilter) x 15 H in
• Body / boiler: Powder-coated carbon steel and polished stainless / stainless-steel-lined aluminum
• Water circuit: AISI 316 food-safe stainless steel
• Auto shut off: Yes
• Pod compatible: Yes (no adapter needed)
• Warranty: 12 months full coverage; 5 years on thermoblock and group
• In the box: Five baskets (2 traditional, 2 pressurized, 1 ESE), stainless tamper, blank basket for backflushing, walnut wood portafilter handle

Setup and care notes

The UNO is single-thermoblock, which means you'll switch between brew and steam temperatures, not run both at once. For a single drink at a time it's seamless; for cappuccinos for two it adds about 30 seconds between shot and steam. Backflushing weekly with the blank basket keeps the group head clean. Residential-rated only; not approved for cafe duty.

Who it's for, who it isn't

It fits the home barista who pulls one or two drinks at a time, wants real PID control and a real 58mm portafilter, and isn't going to use the parallel brew-and-steam workflow that justifies a dual-thermoblock machine. It's the right entry into Ascaso's lineup. It's not the right pick if the household routinely makes back-to-back milk drinks; for that, step up to the Steel DUO.

See it in action

Trying to decide between the Steel UNO and Steel DUO? Our home espresso machine buyer guide breaks down where the workflow difference actually matters.