Dyson PencilVac Review: Living With the World's Slimmest Vacuum

Every cordless vacuum for the last decade has basically looked the same: a motor housing the size of a coffee can, sitting behind a wand. The Dyson PencilVac breaks that shape entirely — the whole machine is a single 38mm-diameter tube, motor included, which sounds like a gimmick until you actually try to clean under a bed frame with it.

A genuinely different shape

The PencilVac's head flattens down to 95mm, low enough to duck fully under sofas, low dressers, and dining chairs that stop a normal stick vacuum's bulkier head dead. Combined with the slim wand, it changes what counts as reachable floor space in a real apartment — the kind of low furniture gap that usually gets skipped ends up getting vacuumed without crouching or attaching a separate flat-head tool.

That slimness comes with a real tradeoff in feel: at 1.8kg, the weight is concentrated along a thin tube rather than spread across a bulkier body, so the balance point is different from what stick-vacuum owners are used to. It's not heavier than competitors, just distributed differently, and it takes a session or two to stop overcorrecting.

FluffyCones and suction power

The new FluffyCones cleaner head uses four conical brush bars instead of one straight roller, and the taper is specifically designed to walk long hair off the end of the bar rather than winding it tighter — a real fix for the wrapped-hair problem that plagues most cordless vacuum heads over time. Power comes from Dyson's Hyperdymium 140k motor, a 28mm motor spinning at 140,000 RPM that delivers 55 Air Watts of suction, numbers that are genuinely impressive for a motor this physically small.

Filtration and emptying the bin

A two-stage linear dust separation system captures 99.99% of particles as small as 0.3 microns before air reaches the motor, and the compressing dust bin design packs debris down to roughly five times the capacity of what its physical size would suggest. That compression helps, but on a heavily-shedding-pet day or after a big cleaning push, it still needs emptying more often than a full-size upright — the tradeoff for keeping the whole machine pencil-thin.

The swappable battery pack and onboard LCD, showing power mode and remaining runtime, make it easy to plan a cleaning session or swap in a charged pack mid-job rather than getting caught with 20% battery halfway through a floor.

Verdict

The Dyson PencilVac isn't thin for the sake of being thin — the shape solves a real problem, letting it reach under furniture that stops every other cordless vacuum on the market, while still hitting genuinely competitive suction and filtration numbers for the category.

It's a premium machine at a premium price, and the redesigned balance takes some adjustment. But for anyone whose current vacuum keeps skipping the space under the couch, this is the first cordless design in years that actually addresses it rather than just adding another attachment.