Dreame L40s Ultra Review: Huge Suction for Pet-Hair Homes

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Overview

The Dreame L40s Ultra is available on Amazon.ca and delivers the highest suction power in its class at 19,000 Pa — a meaningful step up from the 8,000 Pa found on most competing premium robot vacuums. For Canadian households dealing with heavy pet hair through long indoor seasons, mud tracked in through spring and fall, and the mixed hardwood-tile-rug flooring typical of Canadian open-plan homes, the L40s Ultra is built to handle all of it in a single cleaning run.

The standout features for Canadian buyers are the DuoBrush hair-cutting system — which prevents brush tangles that plague longhaired pet owners across Canada — and its ability to climb a 40mm (1.57 in) two-layer step or a 22mm (0.87 in) single step. The hot water mop system cleans pads at around 75°C between sessions, keeping floors genuinely clean rather than spreading redistributed grime.

Key Specifications

Design & Build Quality

The L40s Ultra has a compact cylindrical profile with a dock tower that handles auto-empty, water management, and mop washing in one unit. Build quality is premium throughout — the extending side brush assembly in particular has a solid mechanical feel that matches the robust dock design. Both white and black options are available to suit Canadian interior styles, from modern condo finishes to traditional wood-heavy home designs.

Dreame rates the L40s Ultra to climb a 22mm (0.87 in) single step, and up to 40mm (1.57 in) only where the step has two layers. If your doorway saddles are taller than that single-step figure, measure them before you buy.

Key Features

19,000 Pa TurboForce 6.0 Suction: At roughly 2.4x the suction of most premium competitors, the L40s Ultra delivers faster debris pickup on low-pile carpet and more thorough single-pass cleaning on hard floors — including the fine particulate matter that Canadian heating seasons circulate indoors. Criticaster’s summary of 7 expert reviews gave it 82/100, with suction performance consistently rated as a top strength across reviewers.

DuoBrush Hair-Cutting System: A rubber main brush pairs with a side brush incorporating a TriCut hair-cutting blade that slices through pet hair and long human hair before it wraps around the brush axle. For Canadian households with longhaired pets — particularly common breeds like golden retrievers and Maine Coon cats — this system eliminates the brush-roll cleaning task that otherwise needs attention weekly or more often.

Extending Mops and Side Brush: The mop assemblies extend toward baseboard edges during edge passes and retract in open floor areas. Combined with the extending side brush, this means less debris and uncleaned floor left along wall edges and under furniture overhangs — a practical difference in Canadian homes with baseboards and trim along every room perimeter.

Hot Water Mop Wash (~75°C): The dock washes mop pads at approximately 75°C between cleaning sessions. For Canadian kitchens where cooking grease accumulates and entryways where salt residue and mud build up through winter, hot water cleaning keeps mop pads functional rather than redistributing accumulated grime on the next run.

Threshold Climbing: Dreame rates it for a 40mm (1.57 in) two-layer step or a 22mm (0.87 in) single step.

Performance

The 19,000 Pa suction performance stands out most noticeably on low-pile carpet and in high-traffic entryways where debris grinds into flooring textures — single-pass coverage that competing 8,000 Pa robots need multiple passes to replicate. The DuoBrush system’s practical benefit accumulates over time: owners who previously cleaned their robot brush weekly report that monthly maintenance becomes the norm, particularly in households with dogs or cats that shed year-round through Canadian heating seasons.

Path efficiency is reliable in standard floor plans, though HowToGeek’s review noted occasional redundant coverage in very complex, multi-room layouts with many corridors and furniture arrangements during initial map building. In typical Canadian open-plan main floors the navigation settles into efficient routes after a few cleaning cycles.

How Does It Stack Up Against the Competition?

Here’s how the Dreame L40s Ultra compares to the top robot vacuums available on Amazon.ca for Canadian shoppers.

Is the Dreame L40s Ultra Worth It?

For Canadian households on Amazon.ca where pet hair management and raw cleaning power are the top priorities, the Dreame L40s Ultra is the strongest option in its category. The 19,000 Pa suction clears debris in fewer passes than competing models, and the DuoBrush hair-cutting system makes the robot practical for homes with dogs or cats that shed heavily through Canada’s long indoor seasons. The hot water mop system at 75°C also addresses the mud and tracked-in grime that Canadian entryways accumulate through spring and fall.

The trade-offs are the full MSRP (check Amazon.ca for current promotional pricing before buying) and occasional path redundancy in very complex floor plans during the initial mapping period. Like the Roborock S8 Max Ultra, its dock automatically refills a multi-surface detergent when needed, according to Dreame’s product page. For Canadian buyers where suction and hair management matter most, the L40s Ultra is the top pick in this product group.

GuideRoborock S8 Max Ultra vs Dreame L40s Ultra: Dreame for PetsRead the Guide →

Dreame L40s Ultra

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Sarah MitchellSenior Editor 𝕏 Ⓟ

Sarah has spent more than a few decades — she's not saying how many — in home design, with a sharp eye for products that deliver real quality without the inflated price tag. Her passion is finding the hidden gem that makes everyday life genuinely better.

How this was made: Researched and written with AI from manufacturer specs, independent tests and published reviews, then checked by automated quality checks. We haven’t tested this product ourselves. How we review →