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- Flow vs S20
Narwal Flow vs SwitchBot S20
What Flow does better (6) and where S20 wins (0) — every spec side by side.
Dimensions
Size comparison
FlowS20
| Flow | S20 | Difference | |
|---|---|---|---|
| Height | 95 mm | 115 mm | −20 mm |
| Width / diameter | 364 mm | 365 mm | −1 mm |
| Length | 364 mm | 365 mm | −1 mm |
| Weight | 5 kg | 5.5 kg | −0.5 kg |
Drawn to the same scale from the official dimensions (front and side).
Why is Flow better than S20?
- Suction power22,000 Pa vs 10,000 Pa2.2×
- Mop typeRoller mop vs Mop pad
- Threshold climbing40 mm vs 20 mm2×
- Battery capacity6,400 mAh vs 4,000 mAh+60%
- Height95 mm vs 115 mm+21%
- Charging time180 min vs 240 min+33%
Why is S20 better than Flow?
S20 has no measurable advantages in this pair.
Specifications
Side by side
| Suction & cleaning | ||
| Suction power | 22,000 Pa | 10,000 Pa |
| Dustbin (robot) | — | 310 ml |
| Main brush | Single main brush | Single main brush |
| Anti-tangle brush | Yes | Yes |
| Side brushes | 2 | 1 |
| Carpet detection | Yes | Yes |
| Noise level | 71 dB | — |
| Navigation & obstacles | ||
| Navigation | Laser (LiDAR) | Laser (LiDAR) |
| Navigation sensors | LiDAR laser (LDS), Cliff sensors | LiDAR laser (LDS), Wall sensor, Cliff sensors |
| Obstacle avoidance | AI camera | AI camera |
| Threshold climbing | 40 mm | 20 mm |
| No-go zones / virtual walls | Yes | Yes |
| Room mapping & room selection | Yes | Yes |
| Mopping | ||
| Mop type | Roller mop | Mop pad |
| Mop lifting on carpets | Yes | Yes |
| Mop lift height | 12 mm | — |
| Extending mop (edges) | Yes | — |
| Base station | ||
| Base station | All-in-one dock (empty + wash) | All-in-one dock (empty + wash) |
| Auto-empty dust station | Yes | Yes |
| Dust bag (dock) | 2.5 l | — |
| Mop washing in the dock | Yes | Yes |
| Hot-water mop washing | Yes | — |
| Hot-air mop drying | Yes | Yes |
| Automatic water refill | Yes | Yes |
| Clean water tank (dock) | — | 2.7 l |
| Dirty water tank (dock) | — | 2.5 l |
| Battery & runtime | ||
| Battery capacity | 6,400 mAh | 4,000 mAh |
| Runtime | 190 min | — |
| Charging time | 180 min | 240 min |
| Recharge & resume | — | Yes |
| Size & weight | ||
| Width / diameter | 364 mm | 365 mm |
| Length | 364 mm | 365 mm |
| Height | 95 mm | 115 mm |
| Weight | 5 kg | 5.5 kg |
| Shape | Round | Round |
| Colours | White | White |
| App & smart home | ||
| App control | Yes | Yes |
| Voice assistants | Amazon Alexa, Google Assistant, Apple Siri | Amazon Alexa, Google Assistant, Apple Siri |
| Matter | — | Yes |
| Live camera view / video call | Yes | — |
