Dreame L40 Ultra Gen 2 review: 25,000 Pa and a dock that does the dirty work
The Dreame L40 Ultra Gen 2 pairs 25,000 Pa of suction with DuoScrub spinning mops, an extendable side brush and mop for edges, and a dock that empties the robot, refills water, washes the mops with hot water and dries them. It is one of the strongest values in all-in-one robots. Its dock is large, small-object avoidance is good rather than great, and it needs more upkeep than a simple vacuum.
In this review
I like the Dreame L40 Ultra Gen 2 because it delivers the kind of suction and dock automation that used to be reserved for the most expensive robots, in a package that is much easier to justify.
Owners and published tests both point to excellent pickup on hard floors and carpet, strong pet hair handling and edge cleaning that reaches farther than most round robots. The dock takes care of emptying, mop washing and drying so you can mostly forget about it. It is big, it still benefits from a tidy floor, and it’s overkill for a tiny apartment, but for most family homes it is a standout.
The short answer
- Buy it if you want a true all-in-one robot with very high suction, good mopping and a hands-off dock.
- Its biggest strengths are 25,000 Pa suction, extending brush and mop for edges and a hot-water washing dock.
- Its weak spots are the large dock, small-object avoidance that isn’t class-leading and a few more parts to maintain.
- This model is often on sale, so check today’s price before you buy.
Dreame L40 Ultra Gen 2 at a glance
Dreame L40 Ultra Gen 2 pros and cons
- 25,000 Pa suction for deep carpet and pet hair
- DuoScrub spinning mops scrub well
- Extending side brush and mop reach edges
- Dock empties, refills, hot-washes and dries
- Lidar mapping with multi-level maps
- Matter support for smart home control
- Long runtime for big floors
- 3-year warranty on Dreame’s US store
- Dock takes up a lot of floor space
- Small-object avoidance is only good
- More parts to clean than a vacuum-only robot
- Tanks need refilling and emptying by hand
- Can be loud at max suction
Who should buy the Dreame L40 Ultra Gen 2?
- Family homes with mixed floors
- Pet owners with heavy shedding
- People who want hands-off mopping
- Homes with lots of baseboards and corners
- Multi-level homes
- Buyers who want flagship suction for less
- Small studio apartments
- Very cluttered floors
- Anyone without space for a big dock
- Buyers who want the simplest possible robot
How the L40 Ultra Gen 2 rates in my research
I scored the L40 Ultra Gen 2 by pulling together Dreame’s specifications, independent test results and a broad sample of owner feedback, then weighting each area by how much it affects everyday life.
Vacuuming is the clear headline. A jump to 25,000 Pa puts it far ahead of the original L40 Ultra on paper, and published tests point to a real improvement in pulling embedded hair and debris from carpet.
Mopping is strong for a spinning-pad system. The dual pads scrub with pressure, and the extending mop helps with the dirty strip along baseboards that most robots miss.
Obstacle avoidance is the area where it trails the very best robots. It handles furniture and larger items well, but small, low objects remain a risk.
Scores are my editorial ratings out of 10, based on specifications, published test data and owner reports.
My tip: If your floors are usually tidy, the obstacle score matters less. If kids’ toys and charging cables are everywhere, give it more weight.
First impressions of the L40 Ultra Gen 2
The first thing you notice is the dock. It is a tall, wide station with clean and dirty water tanks on top, a dust bag inside and a washing tray underneath, so plan its spot before it arrives.
The robot itself looks like a modern Dreame: a round body with a lidar turret, a clean finish and a set of side features that only show their value once it starts cleaning.
The dock handles emptying, refilling, washing and drying.
Setup is simple once the dock is in place. You fill the clean water tank, plug the dock in, connect the robot to the Dreame app and run a quick mapping pass.
Owners say the first map comes together quickly and accurately. From there you can name rooms, set no-go and no-mop zones and choose cleaning settings per room.
The first full clean is where the edge features stand out. Watching the side brush and one of the mop pads swing out along a baseboard is the moment many owners say they were sold on it.
What the Dreame L40 Ultra Gen 2 is
The L40 Ultra Gen 2 is Dreame’s updated mid-to-upper tier all-in-one robot. It vacuums and mops in the same run, then returns to a dock that maintains it.
The Gen 2 update centers on suction. Dreame rates it at 25,000 Pa with its Vormax motor, a very large jump from the original L40 Ultra.
The vacuum
Suction is paired with an anti-tangle brush design and an extendable side brush that reaches out at corners and along edges.
A large battery supports long runs. Some published specs list runtimes well over three hours in lighter modes, which covers big homes in one go.
The mop
DuoScrub uses two spinning mop pads pressed against the floor. One pad can extend outward, which Dreame calls MopExtend, to reach closer to baseboards and around furniture legs.
On carpet, the mops lift so rugs don’t get wet, and the robot boosts suction automatically.
The dock
The all-in-one dock empties debris into a bag, refills the robot’s water, washes the mop pads with hot water and dries them with warm air.
That combination is the reason this robot feels hands-off. You refill the clean tank, empty the dirty tank and change the bag now and then, and the dock does the rest.
Dreame’s feature names, decoded
Dreame uses a lot of branded names on the box. Here is what they mean in plain English.
Dreame L40 Ultra Gen 2 dock and design
The dock is big because it does a lot. It holds a clean water tank, a dirty water tank, a dust bag and a washing tray where the mops are cleaned and dried.
After each run, or partway through a long one, the robot returns to the dock. The dock pulls debris into the bag, washes the mops with hot water, and refills the robot’s onboard water so it can keep going.
When cleaning is finished, warm air dries the mop pads. That step matters more than it sounds, because damp pads are the main cause of the sour smell that older mopping robots develop.
Hot-water washing and warm-air drying keep the mops fresh.
Your jobs are simple: refill the clean water tank, empty the dirty water tank and replace the dust bag when the app tells you to. Some owners also add a compatible floor cleaner for automatic dosing.
Every few weeks, it’s worth rinsing the washing tray in the dock. Grit and hair collect there over time, and a quick rinse keeps the dock smelling clean.
My tip: Measure the spot before you buy. Allow space above the dock to lift the water tanks out, and a clear approach in front so the robot can dock straight on.
L40 Ultra Gen 2 vacuuming performance
Vacuuming is the L40 Ultra Gen 2’s best skill. With 25,000 Pa of rated suction, it has the raw power to pull embedded debris and hair out of carpet, not just tidy the surface.
Hard floors
On hardwood, tile and vinyl, it clears dust, crumbs, sand and pet hair with ease. The extending side brush sweeps debris out of corners and away from baseboards, where round robots usually leave a gray line.
Owners regularly mention that edges and corners look noticeably cleaner than with previous robots they’ve owned.
Carpet
On low and medium carpet, the extra suction makes a visible difference. The robot detects carpet, lifts its mops and boosts suction automatically, so you don’t need special settings for rugs.
On very thick or shaggy carpet, results are good but not miraculous. For plush wall-to-wall carpet, I’d still schedule slower, deeper passes for high-traffic areas.
Large debris
Cereal, kitty litter and dry food are handled well. The strong airflow keeps heavier bits from being pushed around rather than picked up.
My tip: Set a deeper suction level and slower pass for entryways and the area around the litter box. That is where the extra power pays off most.
Pet hair and tangled hair
Pet hair is a strong area. High suction lifts fur from carpet and rugs, and the anti-tangle brush design reduces the need to cut hair off the roller.
No robot is completely tangle-free, and very long human hair can still wrap around brush ends over time. Owners with long-haired dogs mention needing only occasional brush checks rather than constant cleaning.
The self-empty dock is a big help in shedding season. Fur goes straight into a sealed bag instead of filling a small bin that you’d empty daily.
The extending side brush reaches into edges where hair collects.
Hair tends to collect along walls and under furniture, and that is exactly where the extending side brush helps. It pulls fur out of the edges before it can drift back into the room.
My tip: During heavy shedding, run a short vacuum-only clean every evening and a full vacuum-and-mop run every few days. It keeps hair from ending up in the mop pads.
L40 Ultra Gen 2 mopping performance
Mopping is strong for a spinning-pad system. Two pads press down and rotate as the robot moves, which scrubs harder than a flat, dragged cloth.
It handles everyday grime, footprints and many dried-on spots well. Very old, sticky stains may still need a second pass or a quick hand scrub.
Edges and corners
MopExtend lets one pad swing outward along baseboards and around table legs. That reduces the dirty strip that most round mopping robots leave behind along walls.
Carpet handling
When the robot detects carpet, it lifts its mops so rugs stay dry. For thick rugs, you can also set a no-mop zone in the app for extra peace of mind.
Freshness
Because the dock washes the pads with hot water and dries them with warm air after every clean, the robot doesn’t develop the musty smell that plagues simpler mopping robots.
Dual spinning pads scrub rather than simply wipe.
My tip: For the kitchen, use a deeper mopping mode and a second pass after cooking. It tackles sticky spots that a quick daily mop might leave behind.
Battery, app and smart home
The large battery supports long runs, and published specs list some of the longest runtimes in its class in lighter modes. Big homes can be covered in a single trip.
If the battery runs low, the robot returns to the dock, recharges and resumes. Mid-run dock visits also wash the mops, which keeps mopping quality consistent across large floors.
The Dreame app is full-featured. You can schedule cleans, set per-room suction and water levels, choose cleaning sequences, set no-go and no-mop zones and review cleaning history.
It supports Matter, as well as common voice assistants. That makes it easier to add to an existing smart home without juggling several apps.
The app has a lot of settings, which is great for tinkerers but can feel busy at first. Most owners set it up once and rarely change things afterward.
Long runtime and recharge-and-resume cover large homes.
How loud is the L40 Ultra Gen 2?
At standard suction, the robot runs at a level you can talk over. At max suction on carpet, it is noticeably louder, as you’d expect from a powerful motor.
The dock has its own noisy moments: a short, loud burst when it empties the robot and a gentler hum during washing and drying.
Drying can run for a while after cleaning ends. It is quiet, but if the dock sits near a bedroom, schedule cleans earlier in the day so drying finishes before bedtime.
My tip: Use quiet mode for daily runs on hard floors and save max suction for carpeted rooms. You’ll get great results with much less noise.
How the L40 Ultra Gen 2 handles each floor type
Hardwood
Excellent. Use a lighter water setting on wood, and the spinning mops will leave a clean, even finish.
Tile and grout
Very good. Pressure from the spinning pads helps with grout lines more than flat-pad mops do, though deep grout stains still need a brush.
Laminate and vinyl
Ideal. Smooth, sealed floors are where both vacuuming and mopping look best.
Low and medium carpet
Very good. The robot lifts the mops and boosts suction on its own.
Thick carpet and shag
Good. It cleans thick carpet well for a robot, but shag rugs with long strands are best kept off its route.
Setting up the L40 Ultra Gen 2, step by step
Start by choosing the dock’s home. It needs a level hard floor, an outlet, space above to lift the tanks out and a clear approach in front.
Fill the clean water tank, install the dust bag if it isn’t already in place, and plug in the dock. Let the robot charge while you install the Dreame app.
Connect the robot to your Wi-Fi in the app and run a quick mapping pass with doors open and the floor tidy. Then review the map, split and name rooms and add no-go and no-mop zones.
Set per-room preferences next. A higher suction level for carpeted rooms, a deeper mop for the kitchen and lighter water for wood floors is a good starting point.
Finally, create a schedule. Many owners run a daily vacuum and a vacuum-and-mop clean every few days, then adjust once they see how quickly floors get dirty.
My tip: Turn on the setting that washes the mops partway through long runs. It keeps the pads cleaner on large floors and improves mopping in the last rooms.
Living with the L40 Ultra Gen 2 over time
All-in-one robots save a lot of time, but they also have more parts to look after than a basic vacuum. Knowing the routine upfront makes ownership much smoother.
Weekly, empty the dirty water tank and refill the clean one. Many owners do this every few days if they mop daily.
Every few weeks, rinse the washing tray, wipe the mop pads, check the brushes for hair and clean the robot’s sensors.
Every month or two, replace the dust bag when the app prompts you. Replace the filter, side brush and mop pads on the schedule the app suggests.
Dreame offers a 3-year warranty on its US store, which is longer than many rivals and a good sign for long-term peace of mind.
What a typical week with the L40 Ultra Gen 2 looks like
Specs only tell part of the story, so it helps to picture how this robot fits into an ordinary week.
On a typical weekday, it runs a combined vacuum and mop on the kitchen and living areas while the house is empty. It comes back to the dock, the dock empties it and washes the pads, and the pads dry before anyone gets home.
Every few days, it runs a full-home clean, including bedrooms and hallways. Carpeted rooms get higher suction, and the mops lift automatically so rugs stay dry.
Your part of the week is short. You top up the clean water tank, pour out the dirty water and glance at the app for any maintenance alerts.
Once a month or so, you replace the dust bag, rinse the washing tray and check the brushes. That is about as close to hands-off floor care as robots currently get.
My tip: Keep a jug of water near the dock. Topping up the clean tank becomes a 30-second habit instead of a chore you put off.
What owners say about the L40 Ultra Gen 2
Owner feedback is strongly positive, with consistent praise for suction, edge cleaning and the dock’s automation.
- Very strong suction on carpet and pet hair
- Edges and corners look noticeably cleaner
- Dock keeps mops fresh and odor-free
- Long battery covers big homes
- Great value for the features
- Dock is large
- Small objects can still be a problem
- App has a lot of settings
- Some maintenance on tanks and tray
The overall pattern is that people upgrading from basic robots are impressed by how little they have to do once it’s set up.
Gen 2 vs the original L40 Ultra
The Gen 2 is a separate model from the original L40 Ultra. It brings much higher suction, but some hardware choices, including parts of the obstacle avoidance system, differ from the original.
Check that the listing says Gen 2 if you want the 25,000 Pa version described here.
Where the L40 Ultra Gen 2 fits best
Family homes
Busy homes with mixed floors, kids and pets get the most from its suction and hands-off mopping.
Pet households
Heavy shedders, litter boxes and muddy paws are all handled well.
Multi-level homes
Multiple saved maps make it easy to use on more than one floor.
Small apartments
It works, but the dock is large and you may not need this much robot. A simpler model may be a better fit.
Running costs to plan for
An all-in-one robot has more consumables than a basic vacuum. None are expensive individually, but they add up over a year.
| Consumable | Relative cost |
|---|---|
| Dust bags | Low to medium |
| Filters | Low |
| Side brush | Low |
| Mop pads | Medium |
| Main brush | Medium |
| Floor cleaner (optional) | Low to medium |
Relative cost over a typical year of regular use.
Mop pads wear fastest on rough tile and textured floors. Replacing them on time keeps scrubbing quality high.
My tip: Buy a Dreame accessory kit with bags, filters, pads and brushes. It is usually cheaper than buying each part separately.
How to get the best results from the L40 Ultra Gen 2
- Map with doors open
Let the first run cover every room.
- Set per-room preferences
Higher suction for carpet, deeper mopping for the kitchen.
- Use no-go zones for cables
Block desk and TV areas with cord clutter.
- Enable mid-run mop washing
Keeps pads clean on larger floors.
- Keep the tanks topped up
A dry clean tank stops mopping.
- Rinse the washing tray
Do it every few weeks to prevent odors.
- Use quiet mode on hard floors
Save max suction for carpet.
A sensible cleaning schedule for the L40 Ultra Gen 2
- Daily: vacuum and mop main rooms
A combined run on the kitchen and living areas keeps everyday mess under control.
- Every few days: whole home
A full vacuum and mop covers bedrooms and hallways.
- Weekly: deep clean
Use higher suction and deeper mopping on high-traffic rooms.
- Monthly: dock and robot care
Rinse the tray, clean sensors and check brushes and pads.
What I’d check before buying the L40 Ultra Gen 2
A few questions will tell you whether this robot fits your home.
Do you have room for the dock?
Measure the footprint and the clearance above for lifting the tanks.
How cluttered are your floors?
Tidy floors get the best results, since small-object avoidance isn’t class-leading.
How much carpet do you have?
Lots of carpet is a strength here, thanks to high suction and mop lifting.
Do you want to plumb in the dock?
This version uses refillable tanks, so plan on topping them up.
How low is your furniture?
Check the gap under sofas and beds against the robot’s height with the lidar turret.
My tip: Confirm the exact model name in the listing. Dreame sells several similar L-series robots with different docks and suction.
Is the Dreame L40 Ultra Gen 2 worth the money?
The L40 Ultra Gen 2 is one of the clearest value picks in all-in-one robots. It brings suction that competes with far pricier robots and a dock that handles nearly every chore.
You get strong vacuuming on carpet, excellent edge cleaning, good scrubbing mops and a dock that hot-washes and dries the pads.
The trade-offs are a big dock, avoidance that isn’t the very best and a little more upkeep than a simple robot.
For most family homes with mixed floors and pets, those trade-offs are easy to accept. You get most of the performance of top-tier robots without paying top-tier prices.
My bottom line is that this is a robot I’d recommend to a wide range of homes, especially if it’s on sale.
Dreame L40 Ultra Gen 2 vs ECOVACS DEEBOT T90 Pro Omni
The closest rival is the ECOVACS DEEBOT T90 Pro Omni, another all-in-one robot with very high suction but a roller mop instead of spinning pads.
| L40 Ultra Gen 2 | DEEBOT T90 Pro Omni | |
|---|---|---|
| Suction | 25,000 Pa | 30,000 Pa |
| Mop type | Dual spinning pads | Self-washing roller mop |
| Edge reach | Extending brush and mop | Roller with edge cleaning |
| Navigation | Lidar turret | Turret-free sensors |
| Dock | Empty, refill, hot wash, dry | Empty, refill, wash, dry |
| Best for | Edges and carpet value | Flat mopping and low furniture |
Choose the Dreame for its extending edge cleaning and outstanding value.
Choose the ECOVACS if you want a roller mop and a lower profile without a lidar turret.
Dreame L40 Ultra Gen 2 specifications
Specifications from Dreame and retail listings. Runtime varies with mode and floor type.
Best Dreame L40 Ultra Gen 2 alternatives
If the L40 Ultra Gen 2 isn’t quite right, these are the robots I’d consider next.
Each of these suits a slightly different home, from low furniture to smaller spaces.
How I researched and rated the L40 Ultra Gen 2
This is a researched review. I based my verdict on Dreame’s specifications, independent test results and a broad sample of owner reviews.
I scored it in these areas:
- Pickup on hard floors, rugs and carpet
- Mopping, edge cleaning and carpet handling
- Navigation, mapping and obstacles
- Dock automation, maintenance and value
Where sources disagreed, I gave more weight to repeatable test results and to patterns that showed up across many owners.
Dreame L40 Ultra Gen 2 FAQ
How strong is the Dreame L40 Ultra Gen 2’s suction?
Dreame rates it at 25,000 Pa, a large jump over the original L40 Ultra.
Does it lift its mops on carpet?
Yes. It lifts the mops on carpet and boosts suction automatically.
Does the dock wash with hot water?
Yes. The dock washes the mop pads with hot water and dries them with warm air.
Does it empty itself?
Yes. The dock empties debris into a bag.
Is it good for pet hair?
Yes. High suction and an anti-tangle brush design make it one of its strongest areas.
Does it work on multiple floors?
Yes. It supports multiple saved maps.
Does it avoid obstacles?
It avoids furniture and larger items well. Small cables and socks can still be a problem.
Does it work with smart home systems?
Yes. It supports Matter and common voice assistants.
Is the L40 Ultra Gen 2 worth it?
It is one of the best values in all-in-one robots, especially on sale. check today’s price.
- Dreame product specifications for the Dreame L40 Ultra Gen 2
- Published independent test results
- Owner reviews and long-term owner discussions
- Amazon product listing for the Dreame L40 Ultra Gen 2
- Review first published.