What It Is
The Flow 2 is Narwal’s flagship robot vacuum and mop, built around a track-style mop that cleans itself continuously with hot water during every run. It’s a different approach than the spinning mop pads most robots use. Instead of rotating dirty pads across your floor until they return to dock, the FlowWash system refreshes the mop in real time — 16 nozzles, 212°F water, a scraper pulling dirty water into a sealed waste tank the whole time it’s working.
This is the second generation of that system. The Flow 2 upgrades the mopping water temperature from 113°F to 212°F, adds a larger 7,000mAh battery, and brings in dual 1080p cameras for obstacle detection. It retails for $1,599 but is currently on sale at $1,099.99.
Where It Sits in the Narwal Lineup
Narwal makes several robot lines. The Freo series uses dual spinning mop pads and starts around $500. It’s capable hardware at a lower price point. The Flow line is the flagship track mop system — a step up in mopping performance and automation.
The Flow 2 sits at the top of that lineup. If you want Narwal’s best mopping hardware, this is it.
Tile, Hardwood, and Carpet Performance
The FlowWash system is what separates this machine from the field. Sixteen nozzles distribute 212°F hot water across the rolling track mop during a clean. A scraper pulls dirty water off the roller continuously into a sealed onboard waste tank. The mop never sits in its own grime and never spreads what it picks up. I tested it across 1,300 square feet of hardwood, tile, and carpet — including dried coffee on tile and tracked-in mud near the back door. Both came up on the first pass.
The Smart Stain Detection feature is real. Onboard visual sensors flagged the mud patch and triggered a reverse cleaning cycle that kept working until it was gone. I didn’t schedule it or request it. It just happened.
On carpet, the CarpetFocus system presses the vacuum cover down to create an airtight seal, pulling embedded debris and pet hair out of carpet fibers more effectively than a standard pass. My Australian Shepherd leaves hair deep in medium-pile carpet and the Flow 2 handled it without leaving visible residue behind. Not a single strand wrapped around the brush in ten days of daily use. Reviewed.com’s tester, who has two heavy-shedding dogs, reported the same over several weeks of testing.
The mop lifts automatically 0.4 inches when carpet is detected, so you’re not dragging a wet track across your rugs mid-run.
App
Setup took under 20 minutes from unboxing to first map. The app is clean, well-organized, and doesn’t require a manual. You can set per-room cleaning modes, adjust suction and mop pressure independently, build schedules, and check status in real time. The smart light bar on the robot handles most of the communication without requiring you to open the app — warm amber means it’s running normally, red means something needs attention.
The honest limitation: the app is less configurable than Roborock’s. Power users who want granular control over obstacle avoidance behavior or detailed per-zone customization will find the Narwal app more opinionated. It makes more decisions for you, which is a feature for most buyers and a friction point for anyone coming from Roborock’s ecosystem. Voice control works through Alexa, Google Assistant, Siri, and the onboard “Hey Nawa” assistant.
Noise Levels
At standard cleaning mode I measured around 60 dB from three feet away — quieter than most household appliances and well below anything that disrupts conversation or wakes a sleeping pet. Narwal rates it at under 56.5 dB. I ran it during a movie and barely noticed it.
Reviewed.com’s tester said she couldn’t tell from sound alone when the machine had started, and her dogs stayed completely unbothered. Amazon reviewer Xi Fei noted her cats napped through it without reacting. Baby Care Mode drops the volume further automatically when the robot detects proximity to a crib.
Maintenance
The base station handles mop washing, warm air drying, self-emptying, and automatic detergent dispensing. That last one is a genuinely useful feature I haven’t seen executed this way on most competitors. There’s a dedicated detergent cartridge built into the dock — you fill it once during setup, and the system auto-dispenses the right amount each cycle. The app notifies you when it runs low. No measuring, no pouring solution into the water tank before every run. Narwal’s floor cleaner runs $29.99 for 930ml, which is the only formula they recommend using.
That matters because Narwal explicitly says not to use third-party cleaning solutions. Their concern is foaming — unapproved soaps can clog the internal water pipes. Their warranty policy lists use of non-approved consumables as a coverage exclusion, so if a third-party soap causes damage, you’re not covered. Plain water works fine for light cleaning if you’d rather skip the solution entirely.
The dock carries a 5-liter clean water tank and a 4.75-liter dirty water tank — among the largest in any flagship track mop unit on the market. I top up the clean tank roughly once a week, sometimes less. The dirty water tank needs periodic emptying on your end. Leave it too long and odor develops. It’s a two-minute task, but it’s the one thing the marketing copy tends to skip over.
One design detail worth pointing out: the port that handles dust bin emptying appears to be built into the ramp itself, positioned underneath where the robot docks. That’s different from how Roborock handles it on the Qrevo Curv 2 Flow, where the suction connection sits at the back of the station. Narwal’s approach keeps the transfer point out of sight and off the floor. I couldn’t find this confirmed in Narwal’s documentation, so take it as an observation from the unit rather than a spec sheet claim — but it’s a cleaner physical solution either way.
The 4L dust bag is rated for up to 120 days before replacement. Android Authority ran it daily for over three weeks and noted the base station handled storage, charging, emptying, filling, and cleaning without issue throughout. In practice the system handles itself well enough that your main weekly task is just checking the water tanks.
Privacy
The Flow 2 processes all visual data locally on the device. Narwal holds TÜV Rheinland certification for both privacy and safety — independent third-party verification, not a self-reported claim.
If you opt in, unknown objects can be sent to Narwal’s cloud AI for identification. That’s a choice, not a default. For a machine with dual cameras running through your home daily, the distinction matters.
Build Quality
My unit arrived in perfect condition — no cosmetic flaws, no damage to any component. The base station is substantial and finished well. The gunmetal design is premium enough that you won’t feel the need to hide it in a corner.
A small number of early Amazon buyers reported scratches out of the box and at least one noted a dented cleaning solution tank on delivery. At $1,099.99 the quality control bar should be consistent. Inspect your unit on arrival. One minor design gripe worth noting: the dust bin lid is a separate piece with nowhere to live while you’re cleaning the bin, and it’s easy to set down and forget.
Wrapping Up
The Narwal Flow 2 and the Roborock Qrevo Curv 2 Flow are the two machines I’d put at the top of this category right now. The mopping system does what robot mops have promised for years and consistently failed to deliver. The suction handles real pet hair loads without tangling, and the base station removes nearly all maintenance from your plate. At $1,099.99 it’s a strong buy. It’s also the first robot mop that made me feel like I didn’t need to go back over the floor after it finished.
Tested over 10+ days across 1,300 square feet of hardwood, carpet, and tile in a Maine home with one Australian Shepherd.
