The C28 is built around a mop that behaves like a tool instead of a rag. A 28cm roller with 24 water ports spins at 270 RPM and is fed fresh water as it turns, so the surface that touches the floor is clean at every pass. That is a mechanical difference from pad systems that simply drag a damp cloth.
On the dry side, a DuoSpiral brush is rated for hair as long as 30 centimetres, which speaks to the homes with long-haired residents and pets. Next to the Roomba 505X it trades a pad system and a famous name for a harder-working roller, and next to the Roborock Qrevo S5V it gives up the extending edge arm in exchange for more scrubbing action.
Remove the roller monthly, rinse the shaft and check the end caps for wrapped thread. Empty the dirty tank after each run even if the dock does it, because a tank left standing overnight is where odor starts.
What works
- 28cm roller with 24 ports keeps the contact surface clean
- 270 RPM spin lifts dried spots instead of smearing
- DuoSpiral brush handles hair up to 30 cm
- Dock washes the roller between runs
Watch out for
- Roller needs rinsing and drying care to avoid mildew
- No edge-extending arm like the Roborock models
Spec sheet
- Mop roller
- 28cm HydroJet, 24 water ports
- Roller speed
- 270 RPM
- Suction rating
- 15,000Pa
- Brush
- DuoSpiral, long-hair handling
- Hair length
- Up to 30 cm






