# Dreame L40s Ultra vs iRobot Roomba Plus 575 Combo + AutoWash Dock

As of Nov 4, 2026, the Dreame L40s Ultra costs $500 and the iRobot Roomba Plus 575 Combo + AutoWash Dock costs $500. The Dreame L40s Ultra scores higher in our ranking (8.8 vs 7.6 out of 10). Pick the Dreame L40s Ultra for pet owners with carpet on a budget. Pick the iRobot Roomba Plus 575 Combo + AutoWash Dock for small homes with tight furniture gaps.

Prices checked Nov 4, 2026. HTML version: https://robotsforthat.com/vs/dreame-l40s-ultra-vs-irobot-roomba-plus-575-combo/

## Side by side

| | Dreame L40s Ultra | iRobot Roomba Plus 575 Combo + AutoWash Dock |
|---|---|---|
| Price | $500 | $500 |
| 3 year cost | $500 | $500 |
| Our score | 8.8/10 | 7.6/10 |
| Rank in Floors | #6 | #16 |
| Status | on sale | on sale |
| Warranty | 3 years (Dreame US store) | n/a |
| Suction | 19,000 Pa claimed (Dreame); Vacuum Chef measured 490 FPM carpet airflow, well above average | 25,000 Pa with four levels (Android.com.pl); iRobot's US page says 3.5X the Roomba Plus 505 Combo |
| Navigation | LDS LiDAR with Pathfinder, 4 maps (Dreame); Vacuum Wars measured 0.85 m2 per minute | ClearView Pro LiDAR with PrecisionVision AI, up to 5 maps, about 9 min to map (iRobot); Netzwelt found it fast and precise |
| Obstacle avoidance | 3D structured light only, no camera or object count (Dreame); Vacuum Wars saw it avoid 7 of 24 objects | PrecisionVision AI recognizes cords, socks and pet waste (iRobot); Android.com.pl saw it avoid cables, laces and toys, while Netzwelt saw it sometimes drive over cables |
| Mopping | Dual spinning mops, 10.5 mm lift, extend and auto removal (Dreame); Vacuum Wars measured 0.95 g water left and a 259 combined mop score | Yes, DualClean spinning pads at 180 RPM with SmartScrub, a 30 mm edge extension and 10 mm rug lift (iRobot); Netzwelt saw it fail on dried ketchup |
| Self empty | Yes, 3.2 L dust bag, up to 100 days (Dreame) | Yes, AllergenLock bag that lasts up to 3 months (iRobot); Android.com.pl lists a 2.5 L bag |
| Dock features | Auto empty, 167 F (75 C) hot water mop wash, hot air drying, self cleaning washboard, auto detergent and water refill, 4.5 L clean and 4.0 L dirty tanks; water hookup kit sold separately (Dreame) | Empties, washes pads at 167°F, dries at 113°F and refills with StayClean solution for up to 40 days (iRobot US page); Android.com.pl's European unit listed 60°C washing and 3.6 L clean and 3.2 L dirty tanks |
| Runtime | Up to 220 min in quiet mode from 5,200 mAh (Dreame); Vacuum Wars estimated about 1,935 sq ft per charge | About 180 min from a 5,200 mAh battery (Android.com.pl); iRobot's US page lists no runtime |
| Dustbin | 310 ml robot bin plus 3.2 L dock bag (Dreame) | 180 ml robot bin and 80 ml water tank (Android.com.pl) |
| Height | 3.82 in (Dreame) | 4.2 in on iRobot's US page; Netzwelt and Android.com.pl list 8.3 cm (3.3 in), so check before buying for low furniture |
| Pet hair | HyperStream Detangling DuoBrush (Dreame); Vacuum Wars measured 91% pet hair pickup, 92% carpet sand removal and 0% hair wrap | Netzwelt and Android.com.pl both saw long hair wrap the main and side brushes |
| App | Dreamehome app with third party voice assistants only (Dreame); Vacuum Chef notes no built in voice assistant or live video | Roomba Home app with schedules, rooms and no go zones; Alexa, Siri and Google Assistant (iRobot); Android.com.pl saw frequent offline drops on 2.4 GHz Wi-Fi |
| Threshold | 1.57 in double layer and 0.87 in single steps (Dreame) | Up to 35 mm (iRobot); Android.com.pl's text says 30 mm |
| Noise | Vacuum Chef measured 78 dB at max suction | n/a |
| Weight | n/a | 9.44 lb robot on iRobot's US page |
| Best for | pet owners with carpet on a budget | small homes with tight furniture gaps |
| Skip if | your floor often has cables, socks or toys | you need deep carpet cleaning |

## What reviewers found

### Dreame L40s Ultra

- Vacuum Wars (3.51 Vacuum Wars stars): 92% carpet sand removal, 91% pet hair pickup and 0% hair wrap with the DuoBrush, about 1,935 sq ft per charge, but only 7 of 24 obstacles avoided. [Source](https://vacuumwars.com/dreame-l40s-series-review/)
- Vacuum Chef (95/100): Scored 95/100 in its real world cleaning tests, measured 490 FPM carpet airflow and 78 dB at max suction. Obstacle avoidance varied by floor and object. [Source](https://vacuumchef.com/dreame-l40s-ultra-review-powerful-suction-smart-mopping-real-world-performance-tested/?amp=1)

### iRobot Roomba Plus 575 Combo + AutoWash Dock

- Netzwelt (Germany): Picked up 29.1 g of 30 g of test dirt. Fast, precise navigation, cleaned under radiators, handled dried coffee but failed on dried ketchup, and sometimes drove over cables. Hair wrapped both brushes. [Source](https://www.netzwelt.de/irobot-roomba-plus-575/testbericht.html)
- Android.com.pl (Poland) (7.8/10): Navigation never failed and it avoided cables, laces and toys. Very good on hard floors, weaker on fine flour in carpet even after two passes. Used about a low teens percent of battery on about 25 m². Repeated Wi-Fi drops in the app. [Source](https://android.com.pl/tech/1093997-recenzja-roomba-plus-575-irobot-opinia/)

## Questions buyers ask

### Which is better, the Dreame L40s Ultra or the iRobot Roomba Plus 575 Combo + AutoWash Dock?

The Dreame L40s Ultra scores higher in our ranking (8.8 vs 7.6 out of 10). Pick the Dreame L40s Ultra for pet owners with carpet on a budget. Pick the iRobot Roomba Plus 575 Combo + AutoWash Dock for small homes with tight furniture gaps.

### What is the difference between the L40s Ultra and the Roomba Plus 575 Combo + AutoWash Dock?

Suction: 19,000 Pa claimed (Dreame); Vacuum Chef measured 490 FPM carpet airflow, well above… on the L40s Ultra, 25,000 Pa with four levels (Android.com.pl); iRobot's US page says 3.5X the Roomba Plus… on the Roomba Plus 575 Combo + AutoWash Dock. Navigation: LDS LiDAR with Pathfinder, 4 maps (Dreame); Vacuum Wars measured 0.85 m2 per minute on the L40s Ultra, ClearView Pro LiDAR with PrecisionVision AI, up to 5 maps, about 9 min to map (iRobot)… on the Roomba Plus 575 Combo + AutoWash Dock. Obstacle avoidance: 3D structured light only, no camera or object count (Dreame); Vacuum Wars saw it avoid 7… on the L40s Ultra, PrecisionVision AI recognizes cords, socks and pet waste (iRobot); Android.com.pl saw it… on the Roomba Plus 575 Combo + AutoWash Dock.

Full reviews: [Dreame L40s Ultra](https://robotsforthat.com/robot/dreame-l40s-ultra/index.md), [iRobot Roomba Plus 575 Combo + AutoWash Dock](https://robotsforthat.com/robot/irobot-roomba-plus-575-combo/index.md)