Narwal Flow 2 Review: A Track-Mop Robot Built for Hard Floors

The Narwal Flow 2 is a premium robot vacuum and mop built for households that want cleaner hard floors with less daily intervention. Its calling card is a self-refreshing track mop, backed by strong vacuuming, sophisticated obstacle avoidance, and a dock that handles most of the dirty work. It is an appealing combination for homes with tile, hardwood, or other sealed hard flooring, but the way its mop handles carpet makes floor type an important buying consideration.

Rather than dragging a flat pad or spinning two small discs, the Flow 2 moves a wide belt of mop fabric across the floor. Clean water continually refreshes the track while dirty liquid is collected inside the robot, limiting how much grime gets redistributed. The system also presses down as it cleans and extends toward edges, giving it useful coverage along baseboards. In extended home use, the result was notably clean-feeling floors, with the rolling mop proving effective at polishing away ordinary marks and everyday dirt.

That favorable impression needs a qualification. In controlled dried-on stain testing, the Flow 2 earned 67.5 points against a category average of 108. A separate coffee-stain test was also disappointing. Yet the same testing found very little residual water on the floor, and later household use produced more encouraging cleaning results after a firmware update. There is no firm evidence that the update caused the difference. The sensible conclusion is that the Flow 2 is persuasive for regular maintenance mopping, but not a guaranteed solution for every stubborn, dried-on spill.

Vacuuming is more consistent. Narwal rates suction at 31,000Pa, although that manufacturer figure should not be confused with an independently measured airflow or suction result. In a carpet deep-clean test, the robot removed 84% of embedded sand from medium-pile carpet, above the test's 78% average. Its tapered, conical main roller is especially useful for hair: a standardized test with seven-inch strands recorded 0% wrapping around the brush or axle. Separate use with human hair likewise found no tight buildup. That should mean less time cutting tangled hair away from the roller.

Carpet compatibility is nevertheless the decisive compromise. The mop lifts by only 10mm when the robot moves onto carpet, and the Flow 2 cannot leave the wet mop at its base for a vacuum-only run. On low-pile rugs, that clearance may be adequate. On thicker or plush carpeting, the damp fabric can brush against the fibers. The strong sand-removal score shows it can vacuum carpet effectively; it does not eliminate the risk of unwanted moisture contact. Homes dominated by medium- or high-pile carpet should look elsewhere.

Navigation helps make the Flow 2 feel genuinely automated. Its vision-based obstacle avoidance steers around shoes, socks, and furniture legs, with one standardized evaluation recording 20 avoided obstacles out of 24. It is not foolproof, though: thin, loose charging cables are still worth picking up before a run. A 7,000mAh battery also supports lengthy jobs; in a roughly 1,300-square-foot home, repeated vacuum-and-mop passes finished without a recharge stop.

The all-in-one station completes the package. Its matte-gray finish, angular lines, and optional front lighting look more restrained than traditional glossy docks. More importantly, it empties dust, manages clean and dirty water, washes the mop with hot water, and dries it with warm air. Users still need to replenish supplies and empty tanks, but routine maintenance is substantially reduced.

The Flow 2 is a strong choice for mostly hard-floor homes, especially those dealing with hair, everyday spills, and clutter. Its track mop and extensive automation deliver real convenience, even if stain removal varies. If thick carpeting is a major part of your home, the non-detachable mop is a compromise too significant to overlook.