The Dyson AM10 is a hybrid humidifier and bladeless cooling fan — one of Dyson's more distinctive appliances — that uses ultraviolet-C (UV-C) light — a short-wavelength, germicidal form of UV radiation — to kill bacteria in the water before dispersing a fine, evenly distributed mist. If you've been considering one — or already own one and want to get the most out of it — this guide walks through how it works, what makes it different, how to use and maintain it, and whether it's still worth picking up today.
See current price and details for Dyson AM10 Humidifier and Cool Fan.
The short version
The AM10 combines Dyson's Air Multiplier fan technology with an ultrasonic humidifier and a UV-C kill chamber. It's quiet, hygienic, and projects humidity across an entire room rather than just a small radius. It's best suited to bedrooms and living rooms in dry climates or heated winter homes, and it doubles as a regular cooling fan in summer.
How the Dyson AM10 works
Most humidifiers either boil water (warm-mist, like the Vicks V745A Warm Mist Humidifier) or use a vibrating piezo plate to atomize it (cool-mist ultrasonic). The AM10 is the latter, but with two distinguishing features.
First, before water becomes mist, it passes through a chamber where it's exposed to ultraviolet-C light. Dyson claims this kills 99.9% of bacteria in the water, addressing a long-standing complaint about ultrasonic humidifiers spreading microbes into the air. (Evaporative units like the Honeywell HCM350W Germ Free Cool Mist Humidifier tackle the same hygiene problem differently, using UV inside the tank rather than in a kill chamber.) Second, the resulting mist is fed into the loop amplifier — the bladeless ring you'd recognize from any Dyson fan — which projects the humidity smoothly and evenly across the room rather than letting it pool around the unit.
Why this matters: Conventional ultrasonic humidifiers create a damp zone right next to the unit, which can leave wet floors, mineral dust on furniture, and cold spots. The AM10's airflow distributes moisture at room scale.
Key specifications
3 liters (about 0.79 gallons)
Up to 18 hours per fill on lowest setting
Designed for rooms up to roughly 400 sq ft
10 airflow settings
UV-C light, claimed 99.9% bacteria kill
Magnetic remote, sleep timer, climate control
Yes, side-to-side
Operates as a cooling fan with humidifier off
Setting it up
Setup is straightforward but worth doing carefully so you don't have problems later.
- Place the unit on a flat, stable surface — ideally hard flooring or a small table, not deep carpet, since airflow draws from the base.
- Lift the loop amplifier off the base by pressing the release. This exposes the water tank.
- Remove the tank, fill with cold tap water (or distilled water, which is preferable — more on that below), and screw the cap on tightly.
- Reseat the tank and the amplifier. The unit will not run if the amplifier isn't seated correctly.
- Plug in. Use the remote to set humidity target, fan speed, and oscillation. The unit can also be put into "auto" mode, where it reads ambient humidity and temperature and adjusts.
Distilled water tip: Tap water contains minerals that ultrasonic humidifiers aerosolize as fine white dust. Even though the AM10's UV chamber handles bacteria, it doesn't filter minerals. Distilled or demineralized water keeps furniture cleaner and extends the life of internal components.
Using the climate control mode
The most useful feature, in practice, is the auto/climate mode. You set a target relative humidity (somewhere between 40% and 60% is generally recommended for human comfort), and the AM10 monitors the room and cycles the mist on and off to maintain it. Combined with the fan, this avoids the over-humidification you can get with cheaper "on or off" units that don't measure ambient conditions.
In summer, you can run the AM10 with the humidifier disabled and use it purely as a bladeless cooling fan. The smooth airflow is one of the quietest in its class on lower speeds.
Pros and cons
Strengths
- UV-C sterilization addresses the biggest hygiene concern of ultrasonic humidifiers
- Even, room-wide humidity distribution thanks to Air Multiplier technology
- Doubles as a year-round cooling fan
- Quiet, especially on lower fan speeds
- Long run time (up to 18 hours) on a single 3L tank
- Easy to clean — no blades, no exposed grilles
Drawbacks
- Discontinued — newer Dyson humidifier-fan models have replaced it
- Premium price compared to basic humidifiers
- 3L tank is modest for very large or very dry rooms (the Levoit LV600HH Hybrid Ultrasonic Humidifier offers a 6L tank with warm and cool mist if capacity is your priority)
- Still produces white mineral dust if you use hard tap water
- No HEPA air purification (unlike Dyson's PH-series units)
Maintenance and cleaning
Dyson recommends a cleaning cycle every month, and the AM10 has a "Deep Clean Cycle" mode built in. The process involves filling the tank with a citric acid solution, running the cycle, and rinsing thoroughly. This descales the piezo transducer and the UV chamber.
- Daily: If you don't run it continuously, empty the tank between uses rather than leaving water sitting.
- Weekly: Wipe the loop amplifier and base with a soft damp cloth.
- Monthly: Run the deep clean cycle with citric acid (food-grade, dissolved in warm water).
- Annually: Inspect the tank seal and cap for wear; replace if leaking.
Don't skip the deep clean. Mineral scale buildup on the ultrasonic transducer is the single most common reason these units stop producing mist. It looks like the unit is broken, but it's almost always descaling that fixes it.
Who it's for
The AM10 makes the most sense if you live in a dry climate, run forced-air heating in winter, or have respiratory and skin issues like dry sinuses or eczema — dry air can strip moisture from skin and mucous membranes, worsening both conditions — that flare up in low humidity. It's also a strong choice for nurseries and bedrooms, where the near-silent operation, sleep timer, and bladeless safety profile all matter.
It's less compelling if you primarily want air purification rather than humidification — Dyson makes separate units for that — or if you only need to humidify a very small space, where a cheaper compact unit like the Pure Enrichment MistAire Ultrasonic Cool Mist Humidifier will do the job for a fraction of the price.
How it compares to newer Dyson models
Dyson has since released the PH series (such as the PH01, PH02, PH03, and PH04) which combine humidification with HEPA air purification and app connectivity. If those features matter to you, the newer models are the upgrade path. The AM10 remains a more focused, simpler appliance — humidifier plus fan, nothing else — and that simplicity is part of its appeal for buyers who don't want another device on Wi-Fi. If you do want smart-home integration without paying Dyson's premium, the Dreo Smart Humidifier HM311S and the Levoit Classic 300S Smart Ultrasonic Humidifier both offer app and voice control at a fraction of the cost.
Frequently asked questions
Can I use the AM10 as just a fan, without humidifying?
Yes. The humidifier and fan functions are independent. You can run the loop amplifier as a standard bladeless fan with the humidifier off, which is how most owners use it during summer.
Do I have to use distilled water?
No, but it's strongly recommended. Tap water works mechanically, but minerals in hard water create white dust on surfaces and accelerate scale buildup on the ultrasonic transducer. Distilled or demineralized water avoids both issues.
How loud is it?
On the lowest fan speeds it's effectively whisper-quiet — quiet enough for a bedroom. The top fan speeds are noticeable but still smoother than a bladed fan because there's no chopping sound from blades.
Why isn't my AM10 producing mist?
The most common cause is mineral scale on the ultrasonic transducer. Run the built-in deep clean cycle with a citric acid solution. Other possibilities: tank not seated correctly, amplifier not locked into the base, or the humidity target has already been reached in auto mode.
Does the UV-C light need replacing?
The UV-C emitter is rated for the expected life of the appliance and isn't a user-serviceable part. If you suspect it has failed, the unit needs to be serviced rather than self-repaired.
Is the AM10 still being made?
It has been discontinued in favor of newer Dyson humidifier-purifier hybrids, but stock is still available through resellers and the refurbished market. Replacement parts and tanks remain available.
Final thoughts
The Dyson AM10 is a niche product done well. It solves the two real problems with ultrasonic humidifiers — uneven mist distribution and bacterial contamination — and bundles a perfectly capable bladeless fan into the same chassis. If you want a single appliance that handles winter dryness and summer airflow, with low maintenance and quiet operation, it's still one of the cleanest implementations of the idea on the market, even years after its release.
