Disclosure: This guide contains affiliate links. We may earn a commission if you make a purchase through these links—at no extra cost to you.
Published: 24 June 2025
Also featured in: Top 10 Smart Vacuum Cleaners for UK Homes in 2025
Overview
The Dreame L40 Ultra is a premium robot vacuum cleaner and mop hybrid designed for homes that demand powerful, precise, and fully autonomous floor care. With a staggering 11,000 Pa of suction, intelligent corner and edge cleaning, self-lifting mops, and automatic maintenance features, it promises a new level of smart home convenience. This in-depth review explores whether the L40 Ultra lives up to its promises in 2025.
Smart Navigation and Quick Setup
Out of the box, setup is quick through the DreameHome app. Once powered on, the robot uses LiDAR to map your home in minutes. You can create cleaning zones, schedule routines, and avoid specific areas—particularly helpful for sensitive rugs. Voice assistants like Alexa and Google Assistant are supported for hands-free control.
11,000 Pa Suction Power with Anti-Tangle Design
The L40 Ultra delivers a class-leading 11,000 Pa suction output, easily handling dirt, dust, pet hair, and fine debris across hardwood, tiles, and carpets. The new TriCut brush system minimizes hair tangles, while 5 suction levels let users customise cleaning based on room type or dirt load.
OmniDirt Detection and RoboSwing for Mopping
The Dreame L40 Ultra uses OmniDirt detection and MopExtend RoboSwing to tackle stubborn wet stains and corner grime. The dual mop pads reach under furniture and deep into edges. It intelligently removes or lifts the mop by up to 10.5 mm when carpets are detected, keeping rugs dry and clean.
SideReach Technology for Corners & Furniture Legs
One standout feature is the SideReach brush, which automatically extends to pull dirt from along walls and around table or chair legs—spots other robots miss. It helps ensure 100% floor coverage even in awkward spaces.
Automatic Mop Washing and Tray Cleaning
The self-cleaning station washes mops and its wash tray using up to 65 °C hot water to break down grime and reduce odours. Four water temperature levels can be selected in the app. This automation reduces manual cleaning, keeps pads hygienic, and extends their lifespan.
Battery Life and Recharge & Resume
The robot features a 5200 mAh battery, providing up to 180 minutes of continuous operation. When low on power, it docks to recharge and then resumes cleaning from where it left off—ideal for larger homes and multi-room layouts.
Warranty and Customer Support
The L40 Ultra comes with a 2-year warranty and responsive after-sales service via the DreameHome app or Amazon support. Users report fast replies and smooth part replacement processes, making ownership less stressful.
Pros
- Extremely powerful 11,000 Pa suction
- Auto-lifting and removable mops protect carpets
- Self-cleaning with 65 °C hot water tray wash
- SideReach and RoboSwing cover tricky edges
- 2-year warranty with app-based support
Cons
- Base station takes up noticeable floor space
- Replacement accessories can be expensive
- No auto mop drying (pads air dry passively)
Final Verdict
The Dreame L40 Ultra sets a new standard in premium robotic vacuuming for UK homes. Its impressive suction, fully automated cleaning system, smart mopping and edge features, plus strong after-sales support make it one of the best choices under £800. If you want hands-off, deep cleaning every day—this is the one to beat.
★★★★★ (5/5)