Goal-based/Robot Vacuums/4 robots compared/Reviewed Sep 19, 2026
Dyson Nurovi, Narwal Freo 20, or Roomba Combo: what’s documented?
Full specifications15 measurements · 48 of 60 documented
How does each dock keep the mop pads clean?
All four ship with a self-cleaning dock. This section checks the pad shape, wash temperature, and drying method each manufacturer documents.
Dyson R2 Nurovi Wash+Dry
Narwal Freo 20 Edge
Plus 575 Combo
Plus 515 ComboDyson's UK product page describes two Reuleaux triangle pads, curves of constant width, built to extend a pad further into a corner than a circular pad allows.
CNET's launch coverage describes the Freo 20 Edge's FlowWash track mop as rinsed by 16 nozzles and a wiper-suction system while a cleaning run is still underway.
What still needs a human hand at the dock?
Dustbin emptying is automated on every model here. This section checks what detergent and water handling still needs a person, and how often.
Dyson R2 Nurovi Wash+DryNarwal Freo 20 EdgePlus 575 ComboPlus 515 ComboiRobot's product page for the 575 Combo lists automatic detergent refill as part of the AutoWash Dock's routine, alongside self-emptying and heated pad drying.
iRobot's own FAQ for the 515 Combo states directly that the dock does not add cleaning solution, and that owners add a compatible solution to the tank by hand.
How much suction and mop pressure is published?
Suction figures appear on most of these spec sheets. This section lines up the pascal, downforce, and carpet-handling numbers each maker documents.
Dyson R2 Nurovi Wash+DryNarwal Freo 20 EdgePlus 575 ComboPlus 515 ComboiRobot's Plus 515 Combo FAQ states the dock delivers 3x the suction of the Plus 505 Combo, but publishes no pascal figure for either model.
Narwal's Freo 20 Edge specifications list 12 newtons of downward mop pressure, the only such figure documented among the four docks compared here.
What size, runtime, and coverage figures exist?
Physical dimensions come from each maker's own spec sheet. This section checks body height, footprint, threshold climb, and whether runtime and coverage are documented.
Dyson R2 Nurovi Wash+DryNarwal Freo 20 EdgePlus 575 ComboPlus 515 ComboiRobot's Plus 515 Combo product page rates the robot at up to 295 minutes and 2,000 square feet per charge, figures none of the other three models publish.
Dyson's UK specifications list a 40 mm threshold climb and a 96 mm body height, both higher than the compact-tier figures iRobot publishes for its two Combo models.
How much independent evidence exists so far?
Ten weeks separate the oldest and newest release here. This section checks what launch coverage, retail listings, and owner reports actually document.
Dyson R2 Nurovi Wash+DryNarwal Freo 20 EdgePlus 575 ComboPlus 515 ComboExpert Reviews describes watching a Dyson-staged event demo handle salt and water spills, but its own coverage notes the demo never pointed the pads at a corner.
Vacuum Wars and Reviewed both covered the Plus 515 Combo's July 2026 launch without publishing any test results of their own, per their own coverage.
In closing
What the evidence shows
Patterns that emerged across the questions above.
Pad geometry and cleaning cadence differ
The four docks share auto-empty and heated drying, but pad shape and wash timing vary: Dyson's constant-width pads, Narwal's continuous mid-run rinse, and two spinning-pad iRobot designs.
Published spec depth is uneven across models
Suction, runtime, and footprint figures appear for some models and are absent for others; the Plus 515 Combo publishes runtime and coverage that the other three do not.
None carries a completed independent review yet
All four reached market within the last ten weeks, and only a manufacturer-staged demo has been documented for any of them beyond spec sheets and launch coverage.
Common questions