Espresso Series 1
Series 1 pairs a 58 mm portafilter with guided recipes and adjustable pressure profiles. Its Boosted Boiler system combines a single boiler with two additional heaters. A temperature-sensing steam wand stops at your chosen milk temperature; grinding and puck preparation remain in your hands.
US catalog · Series 1 · 120 V
New · Black · 120 V
In stock when checked Nov 9, 12:19 AM UTC. Affiliate link
Specification research, not a hands-on review. Sources checked November 6, 2026.
- Heating system
- Single boiler with flow-through and grouphead heaters
- Portafilter diameter
- 58 mm
- Milk workflow
- Assisted steam wand with automatic temperature stop
- Integrated grinder
- No
Living with the Espresso Series 1
Your coffee routine
Plan for a separate espresso grinder.
Milk workflow: Assisted steam wand with automatic temperature stop.
Brew and steam in sequence.
On your counter
Dimensions are not verified in this profile.
Allow extra room for access, refilling and cleaning. Published dimensions do not include installation clearance.
Daily setup
Water reservoir: 2 L.
Power supply: 120 V · 1500 W.
Plan this setupFollow the manufacturer’s manual for water, cleaning and maintenance instructions.
Look a little closer.
Real photographs. Documented features.

Start where the coffee sits.
Fellow documents a 58 mm portafilter. The manufacturer photograph shows its portafilter and tamper; diameter alone does not establish accessory compatibility.
- Portafilter diameter
- 58 mm Source ↗
Specifications
| Heating system | Single boiler with flow-through and grouphead heatersSource ↗Fellow calls the three-heater architecture Boosted Boiler; it is not a dual-boiler machine. |
|---|---|
| Portafilter diameter | 58 mmSource ↗ |
| Integrated grinder | NoSource ↗ |
| Milk workflow | Assisted steam wand with automatic temperature stopSource ↗ |
| Brew & steam together | NoSource ↗ |
| Water reservoir | 2 LSource ↗ |
| US supply voltage | 120 VSource ↗The manufacturer specifies a 110–120 V range for the US model. |
| Rated power | 1500 WSource ↗Current manufacturer specification. Some retailer pages list 1700 W; verify the unit’s rating plate before planning an electrical load. |
| Manufacturer extraction claim | 9 barSource ↗Manufacturer states up to 9 bar of extraction; this is not an independent pressure measurement. |
| Pump rating (not brew pressure) | 15 barSource ↗Pump rating, separate from the manufacturer’s extraction-pressure claim. |
Published source specifications. Unknown values stay unknown.
Compare with
Mio
Heating system: Brew boiler + steam thermoblock
Silvia
Heating system: Single boiler
Sources
This profile cites US manufacturer or retailer documentation. Source-listed offers keep their merchant SKU and finish; matching prices do not establish identical hardware revisions across stores.
- Fellow Espresso Series 1 · US product page ↗
- Fellow Espresso Series 1 — official US product documentation ↗
· Checked November 6, 2026 - Fellow Espresso Series 1 — official US product documentation ↗
· Checked November 6, 2026 - Fellow Espresso Series 1 — official US product documentation ↗
· Checked November 6, 2026
Product photography from the linked source; the pictured finish is noted above. Image source ↗. A manufacturer SKU identifies a configuration, not a confirmed hardware revision.
