First Look: Unboxing and Setting Up the Eufy Omni S2

This unit was purchased for personal use. This review is not sponsored, approved or otherwise affiliated with Eufy.

The Eufy Omni S2 is a major redesign of the company’s flagship robot vacuum, with a new cyclone dust system, an extending mop roller, an extendable side brush and more hardware aimed at improving carpet cleaning.

Compared with the S1 Pro, the S2 makes substantial changes to both the vacuuming hardware and the way the robot handles carpet, edges and floor transitions.

Unboxing, Setup and Mapping

The S2 arrives in a large cardboard box containing the robot, UniClean base station, water tanks and setup accessories.

Setup requires more assembly than some self-emptying docks. The UniClean base station’s screen module ships separately and must be pressed into place on top of the dock before use.

After the screen is installed, the clean-water tank can be filled, the base station positioned in an open area and the robot paired with the Eufy app for its initial mapping run.

During mapping, the S2 will identify walls, rooms and floor boundaries. It also uses furniture and other visual information to identify room types and build a 3D map.

After the map is created, users can edit room divisions, rename rooms, adjust boundaries and manage no-go or no-mop zones.

The initial mapping run is relatively quick, though repeated cleaning runs provide a better sense of how well the S2 handles rugs, thresholds, room boundaries and furniture.

Cyclone Dust Collection

Removing the top cover reveals the S2’s AeroTurbo 2.0 vacuum system.

Rather than sending all collected debris directly toward the pleated filter, the cone-shaped cyclone uses centrifugal force to separate dust and larger particles from the airflow first. Eufy rates the system at up to 100 air watts.

The S2 is also rated at 30,000 Pa of suction, up from 8,000 Pa on the S1 Pro.

Eufy says the cyclone design is intended to help maintain airflow as the dustbin fills. The company claims up to 15 times longer-lasting suction and says the filter can remain clean for up to 365 days, although those figures come from Eufy’s laboratory testing.

The S2 is the second Eufy model to ship with a cyclonic dust-separation system, following the 3-in-1 E20.

In a quick rice pickup test, the S2 collected 87 grams of scattered rice out of a possible 90 grams, or 96.6%, on carpet. That was a substantial improvement over the S1 Pro, which collected 12 grams, or 13.3%, in the same test.

The circular pleated filter sits behind the cyclone assembly as part of Eufy’s five-layer AirClean filtration system. Eufy says the system can capture up to 99.99% of household allergens, although that figure is difficult to independently verify outside controlled laboratory testing.

Updated Roller Mop with Extended Edge Cleaning

The HydroJet 2.0 roller spans much of the rear underside and provides 11.4 inches of cleaning coverage.

Eufy rates the mop at 15 newtons, or about 3.3 pounds, of downward pressure and 240 rpm, compared with 10 newtons and 170 rpm on the S1 Pro.

During cleaning, 32 water-injection ports feed the roller while a dual-scraper system washes the mop and removes excess dirty water before it returns to the floor. The robot also carries separate clean- and dirty-water reservoirs so the roller can be rinsed continuously during a cleaning run.

The roller can extend up to 0.59 inch beyond the body to improve coverage along walls and edges, leaving a gap of about 0.2 inch from the wall.

Eufy says the S2 can recognize different floor surfaces, including hardwood, tile and marble, and adjust water output accordingly.

The S2 also changes how dirty water is handled inside the robot. Like the S1 Pro, it carries an onboard dirty-water reservoir, but the S2’s layout is closer to the system used on the E25 and E28.

It uses a thicker scraper against the roller to strip away water and debris before the mop returns to the floor, then channels that waste into the internal reservoir. The design helps keep clean and dirty water separated during a cleaning run.

The S2 also generates electrolyzed water onboard for mopping. Eufy says the system produces hypochlorous acid and ozone and is rated for 99.99% bacteria removal in laboratory testing.

Carpet Cleaning and the Ability to Lift

The S2 adds an adaptive chassis that can lift the front of the robot to improve clearance over thresholds and thicker carpet.

Eufy says the robot can cross single thresholds up to 1.38 inches and double-layer thresholds up to 1.65 inches, while the chassis can raise automatically on shag carpet up to 2 inches high.

The S2 can also adjust suction and mop position as it transitions between hard surfaces and carpet.

New Obstacle Avoidance and Navigation System

The front of the S2 houses Eufy’s new CleanMind AI system, which combines an RGB camera, 3D ToF depth sensing and an LED illumination light with an 8-core processor rated at 6 TOPS of computing power for navigation and object recognition.

The system replaces the S1 Pro’s 3D MatrixEye setup and gives the front sensors a broader role in how the robot identifies and responds to its surroundings.

Eufy says CleanMind can recognize more than 200 types of obstacles, including cables, shoes, fabrics and pet waste, and detect objects as small as about 0.4 inch.

The S2 can also vary how closely it approaches different objects based on their perceived risk.

Its separate camera-based system is designed to identify more than 40 types of dirt and liquid spills and adjust cleaning behavior when they are detected.

As with the S1 Pro, the sensors are integrated into the front of the robot instead of a raised lidar turret, helping the S2 maintain a lower profile for cleaning beneath furniture.

Dual Anti-Tangle Main Brushes and an Extendable Side Brush

The S2 uses Eufy’s DuoSpiral anti-tangle roller system, with two main brushes housed inside a removable brush assembly.

The dual-brush system replaces the S1 Pro’s single rubber main brush and is similar to the setup already used on the E25 and E28.

The S2 also adopts Eufy’s CornerRover extendable side brush, previously used on the E25 and E28. The extending brush swings outward to reach closer to walls, corners and furniture edges than a fixed side brush.

Built-In Fragrance

Eufy includes a removable fragrance cartridge beneath the S2’s magnetic top cover, positioned beside the dust collection system.

The cartridge fits into a dedicated compartment inside the robot, where airflow generated during cleaning carries the fragrance into the room as the S2 moves across the floor.

The cartridges do not require a separate spray mechanism or liquid reservoir. Instead, the scent is released gradually while the vacuum is operating. Eufy says each fragrance cartridge can last up to three months, depending on how often the robot is used.

The S2 includes three fragrances: Citrus and Basil, Bamboo and Sage, and Bergamot and Lychee.

Maintenance, Pricing and First Impressions

While the S2’s upgrades are welcome, they also introduce more mechanical complexity and several new components that have yet to be proven over long-term use.

Eufy says the AeroTurbo 2.0 filter can remain clean for up to 365 days while maintaining suction. However, that claim deserves some skepticism given how quickly fine dust can accumulate inside a robot vacuum during regular use.

The redesigned dirty-water reservoir may also make maintenance more involved. The added mop pressure is a clear improvement, but the scraper is no longer removable and the debris tray is harder to access than on the S1 Pro, which could make buildup more difficult to clear.

Despite those concerns, the S2 largely maintains the premium design and finish of the S1 Pro.

The robot and UniClean base station still feel like flagship hardware despite the lack of “Pro” in the model name, while newer technology such as the cyclone and CleanMind AI gives the S2 a more ambitious feature set.

Some of those claims, particularly those surrounding the cyclone and CleanMind AI, remain unproven and should be viewed with some caution.

The S2 carries a suggested retail price of $1,599.99 in the U.S., placing it at the top of the robot vacuum market. Eufy has offered temporary discounts, but even at $1,299, it remains one of the most expensive flagship models.

At that price, cleaning performance, maintenance requirements and long-term reliability will be important factors in determining whether the S2 delivers enough improvement over the S1 Pro.

A more thorough review is planned after several more months of use, with a closer look at cleaning performance, navigation, maintenance and reliability.