☕ ESPRESSO MACHINE REVIEW

Gemilai Whale G3038A Review (2026)

Gemilai

Written and reviewed by the CoffeeLabAdvisor editorial team · Published 23 October 2026

The Gemilai Whale G3038A is Gemilai's E61 machine: a classic brass E61 group, a two-litre stainless heat-exchanger boiler, a pressure gauge on the group and a knob that adjusts brewing pressure while the shot runs. Amazon's title calls it a 2L brew steam boiler, which reads like a dual boiler; it is a single boiler with a heat exchanger, and that difference decides how you control its temperature.

A genuine E61 heat exchanger with a gauge, live pressure control and simultaneous brew and steam in a narrow body. Expect a long warm-up, indirect brew temperature and a short ownership record.

Best for: E61 buyers with narrow counters who steam for several people

Boiler

Heat Exchanger (2.0 L)

Wattage

1550W

Tank

1.5L

Weight

19.1 kg

Steam

Manual

✓ Pros

Genuine E61 brass group with thermosiphon circulation
Brews and steams at the same time
Live pressure adjustment with a group-mounted gauge
Narrow 22.8 cm body for an E61 machine

✗ Cons

About 25 minutes for the E61 group to settle at temperature
PID sets the steam boiler only; brew temperature needs a cooling flush
Heavy at 19.1 kg
No built-in grinder (separate espresso grinder required)

Shot Quality

The Whale brews through a genuine E61 group, the solid brass design used on many prosumer machines, with thermosiphon circulation keeping the group hot and the E61's mechanical pre-infusion. Gemilai adds a programmable electronic pre-wet and pause of up to ten seconds each on top. Brew water is heated by passing through a tube inside the steam boiler, the heat-exchanger arrangement, so there is no direct brew temperature setting: the PID controls the steam boiler, and brew temperature follows from it. Brew Coffee Home is explicit that if you want to set brew temperature to the degree, you should buy a dual boiler instead. In return, once the group is up to temperature it found thermal stability excellent, with back-to-back shots holding steady. The pressure knob and group gauge let you profile the shot live, and the same reviewer checked the gauge against an external meter and found it accurate. The pump is a vibratory pump; Gemilai publishes no pump rating, only a recommended brewing range of six to eleven bar.

Steam, Warm-Up and Temperature

Because the steam boiler is always hot, the Whale brews and steams at the same time, which neither the Owl nor the US Ele can do. The steam wand is a long three-hole wand switched electronically through a solenoid, and Brew Coffee Home textured milk in about thirty to forty seconds. Steam boiler temperature is adjustable from 176 to 275°F. That power makes oat and soy straightforward, though texturing is fully manual, so we rate it four out of five for plant milk. The price of the E61 is time. The steam boiler reached temperature in about eight to nine minutes in hands-on testing, but the group was only around 87°C after twenty minutes and needed a full twenty-five minutes to settle at 93°C. A smart plug or timer solves this for most owners. The other cost is the heat-exchanger habit: water sitting in the exchanger overheats when the machine idles, so you run a short cooling flush before brewing, the routine every heat-exchanger owner learns.

Who It's For

The Whale is for someone who wants the E61 experience, a heavy brass group, a gauge, a lever-style workflow and simultaneous brewing and steaming, without the width of a typical E61 machine. At 22.8 centimetres wide it fits counters that most E61 machines will not, although it is deep at 42.3 centimetres and heavy at 19.1 kilograms. It suits households that make milk drinks for several people at once, and anyone who enjoys pressure profiling with a real gauge. It is a poor fit if you want a machine ready in a few minutes, since even the quick Owl beats it by a wide margin, or if you want to set brew temperature precisely on a screen, which needs a dual boiler. If you mainly want pressure control and steady milk and can live with brewing and steaming in sequence, the Ele offers live pressure adjustment and a steam probe for considerably less. A machine at this level also deserves a grinder that can resolve small adjustments.

Build & Value

Hands-on testing describes the Whale as heavy for its size, with thick metal panels, copper hot-water lines and solid brass fittings, and judged it built for long-term durability. The body is mirror-finish stainless with walnut accents, and the box includes a walnut double-spout portafilter, a single basket, a blind disc for backflushing and a milk jug. The tank is 1.5 litres, smaller than the Owl's, with a low-water reminder. The model is new: Gemilai's own listing dates from May this year, so nobody has owned one long. Gemilai previously sold an E61 machine, the G3035, which appears to have been the Whale's predecessor, though Gemilai does not say so. The value case is an E61 heat exchanger with a gauge, live pressure control and a narrow body; the costs are the long warm-up, indirect brew temperature, and an ownership record that is still only months old.

What This Review Is Based On

This review is a synthesis of published evidence, not a test of our own unit. The specifications come from Gemilai's own spec tables and Amazon listing, checked against hands-on reviews that measured or opened the machine. You should know one thing about those hands-on reviews: every one we found was carried out on a unit Gemilai supplied to the reviewer, and the reviewers say so. That does not make their measurements wrong, and where two of them measured the same thing they broadly agree, but it does mean nobody we could find bought this machine at retail and reported on it after a year or more. Long-term reliability is therefore the biggest unknown here, and we would rather say that plainly than imply a durability record that does not exist yet. On warranty: Gemilai's written policy gives two years from a purchase made through its own online store, and it does not say whether a purchase from the Gemilai storefront on Amazon receives the same cover. If warranty matters to your decision, ask Gemilai support before you buy, and keep your order confirmation.

Gemilai Whale G3038A $1,299.99 on Amazon

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Gemilai Whale G3038A — FAQ

Is the Gemilai Whale a dual boiler machine?

No. Despite the Amazon title's 2L brew steam boiler wording, the Whale has one two-litre stainless boiler with a heat exchanger running through it. Gemilai's own spec table and the hands-on review both describe it as a heat exchanger. It can still brew and steam at the same time, but brew temperature is indirect and you control it with a cooling flush.

How long does the Gemilai Whale take to heat up?

Longer than most people expect. In hands-on testing the steam boiler was ready in about eight to nine minutes, but the E61 group took around twenty-five minutes to settle at its brewing temperature. That is normal for an E61 group, which relies on slow thermosiphon circulation. Most E61 owners use a smart plug or timer so the machine is warm when they get up.

Can you set the brew temperature on the Gemilai Whale?

Not directly. The Whale's PID controls the steam boiler temperature, adjustable from 176 to 275°F, and brew temperature follows from that through the heat exchanger. Lowering the steam setting lowers the brew temperature, and a short cooling flush before each shot removes overheated water. If you want to dial brew temperature by the degree on a display, a dual boiler is the right machine.

Does the Gemilai Whale have a real E61 group?

Yes. Gemilai specifies a classic E61 brass group head with thermosiphon circulation and mechanical pre-infusion, and the hands-on review confirms a solid brass 58mm E61 group. That is a real difference from the Owl, whose group only looks like an E61. Standard E61 parts and 58mm accessories should fit, though it is worth checking gasket sizes with Gemilai.

Should I buy the Gemilai Whale or the Ele?

Buy the Whale if you need to brew and steam at the same time, want a real E61 group and gauge, and do not mind a long warm-up. Buy the Ele if you want live pressure adjustment and a steam wand that stops at a set milk temperature, prefer a three-minute warm-up and direct brew temperature control, and can brew and steam one after the other.

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