Avalla Dehumidifiers Compared: X-300, X-350, X-125, X-150, X-200 & S-200 (UK 2026)

If you have been searching for an Avalla dehumidifier, you have probably noticed the range can be confusing. There are now two generations to choose between: the current X-300 and X-350, and the earlier X-125, X-150 and X-200. Then there is the S-200, which is actually a portable air conditioner with a dehumidifier built in. The model numbers do not make the differences obvious, and the prices do not climb in the order you would expect.

This guide cuts through it. We will look at what each Avalla model is for, how they compare on the specs that matter, and which one suits your space, so you can buy once and get it right.

Avalla in brief

Avalla is a UK-focused brand that has built a name around damp control and indoor air quality. Its dehumidifiers use compressor technology with the company's Aero-Dynamic air circulation, designed to pull moisture out of a whole room rather than just the corner the unit sits in.

The range has moved on. The X-300 and X-350 are the current models, and they are quieter and cheaper to run than the X-series units they replace, at noticeably lower prices. The older X-125, X-150 and X-200 still turn up in stock and are still good machines, but they are no longer the default answer.

The headline point: every one of these tackles damp, condensation and mould, and every one will dry laundry indoors. The differences come down to extraction capacity, room coverage, noise, and — with the S-200 — whether you also want cooling.

The Avalla range at a glance

A word on pricing, because it surprises people. The current X-300 and X-350 undercut the entire older line while performing better on noise and running cost. Where you still find the earlier X-series listed, the pricing is erratic — the smaller X-125 is often shown above the larger X-200, which reflects thinning end-of-line stock rather than any real price ladder. Always check the current price on the product page before you decide.

Avalla X-300 — the current pick for most people

The Avalla X-300 10L dehumidifier is where most buyers should start. It extracts 10L a day, covers rooms up to 38 m² on 100 m³/h of airflow, and it is the model that takes the "quietest and cheapest to run" crown off the X-125.

Noise and running cost. It runs at 30 dB and draws 0.16 kW/h, which Avalla put at roughly 4p per hour. For comparison, the X-125 it supersedes managed 42 dB and 0.21 kW/h. That is a meaningful gap — 30 dB is whisper-quiet, and the difference matters most in exactly the rooms people put a dehumidifier in overnight.

Controls. A built-in humidity sensor holds your set level automatically rather than running flat out, with two fan speeds, a 24-hour timer, a digital display and a touch control panel. There is a dedicated laundry mode, a sleep mode and a plain fan mode.

Tank and drainage. The 2L tank is on the small side for a 10L/day unit, so if you are running it hard against real damp you will be emptying it more than once a day. Continuous drainage is supported and is the sensible option for a cellar or utility room where you can route a hose to a drain.

Worth knowing. There is no app and no WiFi — Avalla's "smart" refers to the humidity sensor, not connectivity. It uses R290 refrigerant, and like every compressor dehumidifier it loses efficiency in the cold, so a desiccant model remains the better tool for an unheated garage. The review base is still small at 23 ratings, simply because it is a recent model.

Pick the X-300 if: you want the quietest, cheapest-to-run unit in the range for a bedroom, office or large lounge.

Avalla X-350 — more coverage, plus an ioniser

The Avalla X-350 12L dehumidifier and air purifier is the larger of the current pair: 12L a day, up to 46 m² of coverage, and 120 m³/h of airflow. That is the same coverage the older X-150 offered, at a lower price and a much lower noise figure.

The ioniser is what separates it from the X-300. Beyond the extra 2L a day and the wider coverage, the X-350 adds a built-in ioniser, which Avalla say breaks down airborne particles and deodorises the air. Treat the accompanying "eliminates 99.9% of bacteria and viruses" claim with the scepticism any such number deserves — it is a manufacturer figure, not an independently tested one. If you want damp control and nothing more, the X-300 does that for about £10 less.

Everything else mirrors the X-300: 30 dB, roughly 4p an hour, a 2L tank with continuous drainage, R290 refrigerant, laundry and sleep modes, a 24-hour timer and a digital touch display. The 2L tank is genuinely small for a 12L/day machine, so continuous drainage is the realistic way to run it against persistent damp.

Pick the X-350 if: you need multi-room coverage, or you want air purification alongside damp control.

Avalla X-125 — the earlier smart compact

The Avalla X-125 12L Smart Dehumidifier was the quiet, low-running-cost choice before the X-300 arrived and beat it on both counts. It still covers rooms up to about 30 m², moving 120 m³ of air an hour on roughly 0.21 kW/h, which Avalla put at around 5p per hour — cheap enough to leave on through a damp winter, just no longer the cheapest in the range.

What "smart" actually means here. It is worth being precise, because the name invites the wrong assumption: the X-125 has a smart humidistat, not an app. It reads the room's humidity continuously and cycles itself to hold your target, and you set that target with a capacitive touch slider on the top panel. A large display shows the current humidity, and a colour-changing indicator light tells you at a glance whether the air is dry, comfortable or damp. There is no phone app and no WiFi.

Noise. At a maximum of 42 dB it was the quietest unit in the range until the 30 dB X-300 replaced it. That is around the level of a quiet library, and there is a dedicated sleep mode that drops it further for overnight running.

Tank and drainage. A 2.5L removable tank — actually larger than the current models' 2L — covers most rooms for a day or so. For anything continuous it takes a continuous drainage hose instead, and Avalla include a 2m hose in the box so you can run it to a drain without buying extras.

Modes. Four: standard dehumidifying on the humidistat, continuous dehumidifying, a clothes-drying mode that runs at maximum extraction, and a plain aeration mode. There is a built-in timer and a washable filter, so there are no consumables to replace.

Worth knowing before you buy. It uses R290 refrigerant, which is natural and non-toxic but does mean the usual care about ventilation in very small enclosed spaces. It also needs a minimum operating temperature of 16°C — like all compressor dehumidifiers, it loses effectiveness in an unheated garage or outbuilding in mid-winter. The mains cable is 1.8m.

Pick the X-125 if: you find one at a good price and want its larger 2.5L tank and bundled drainage hose. Otherwise the X-300 does the same job more quietly and for less.

Avalla X-150 — the all-rounder

The Avalla X-150 16L Dehumidifier steps up to 16L/day and uses Avalla's Aero-Dynamic technology, moving around 190 m³/h of air for whole-home coverage. For a typical two or three-bedroom house with general condensation, the X-150 has enough headroom. Note that the current X-350 matches its 46 m² coverage at a lower price, so the X-150 earns its place mainly on the extra 4L a day of extraction.

Pick the X-150 if: you want more raw extraction than the current models offer and you have found one in stock.

Avalla X-200 — maximum extraction

The Avalla X-200 20L Dehumidifier is the heavy hitter, pulling up to 20L/day with 195 m³/h airflow. If your home is large, persistently damp, or you are drying a lot of washing indoors over winter, this is still the one with the most extraction capacity of any Avalla dehumidifier — the current X-300 and X-350 are quieter and cheaper, but neither matches it for raw output.

Pick the X-200 if: you have serious or whole-home damp and want the most extraction available in the range.

Avalla S-200 — the 3-in-1 for summer too

The Avalla S-200 Portable Air Conditioner with 24L Dehumidifier is a different animal. It is a 9,000 BTU portable air conditioner that also runs as a 24L/day dehumidifier and a cooling fan, with Energy Class A efficiency and coverage up to 85 m². If you are searching for the "Avalla air conditioner", this is it.

The trade-off is price and footprint — it is the most expensive unit and the largest, because you are buying three appliances in one. But if you battle damp in winter and heat in summer, it can replace two purchases and save you storing a separate AC unit.

Pick the S-200 if: you want dehumidifying through the cold months and proper cooling in summer from one machine.

Which Avalla should you buy?

• Most people, one or two rooms, want it quiet and cheap to run: X-300.
• Multi-room damp, or you want air purification too: X-350.
• Big or very damp home, maximum extraction: X-200.
• Average house, general condensation, if you find one: X-150.
• You want the larger 2.5L tank and bundled hose at the right price: X-125.
• Damp in winter and heat in summer: S-200.

Frequently asked questions

Which Avalla dehumidifier is the quietest? The current X-300 and X-350, both rated at 30 dB. That is quieter than the 42 dB X-125 that previously held the title, and it is the main practical reason to choose the current generation for a bedroom or a home office.

What is the difference between the Avalla X-300 and X-350? Three things. The X-350 extracts 12L a day against the X-300's 10L, covers up to 46 m² against 38 m², and adds a built-in ioniser for air purification. It costs around £10 more. If you only need damp control rather than air purification, the X-300 is the better value of the two.

Should I buy the X-300 or the older X-125? The X-300 on almost every measure — it is quieter (30 dB against 42 dB), cheaper to run (about 4p an hour against 5p), and usually a good deal cheaper to buy. The X-125's advantages are a larger 2.5L tank against the X-300's 2L, and a 2m drainage hose in the box. If you plan to use continuous drainage anyway, those matter less than they sound.

Are Avalla dehumidifiers any good for mould and condensation? Yes. These are compressor-based units sized for continuous damp control, which is exactly what stops condensation on windows and the musty smell that leads to mould. Match the extraction rate to your room size and run it on a humidistat setting around 50–55% relative humidity.

Can an Avalla dehumidifier dry laundry indoors? All of the models here will dry washing indoors — point the airflow at the clothes and close the room. The X-300 and X-350 have a dedicated laundry mode, as does the X-125, and Avalla claim savings of up to 95% against tumble drying. The higher-capacity X-200 and S-200 will clear a full load fastest.

Do any Avalla dehumidifiers have an app or WiFi? No. Not the X-300, not the X-350, and not the X-125 despite the "smart" in its name. Across the range, "smart" describes the automatic humidistat that holds your chosen humidity level on its own. All control is on the unit itself. If app control is essential to you, none of these is the right choice.

Where can I find the Avalla X-125 manual? Avalla publish the user manual for each model on their own site under the product's support section, and a copy ships in the box. It covers the control panel, the drainage hose fitting and filter cleaning, which are the three things people usually go looking for.

What is the difference between the Avalla X-200 and the S-200? The X-200 is a dedicated 20L dehumidifier. The S-200 is a 3-in-1 that also provides 9,000 BTU air conditioning and a fan mode, so it costs more but covers summer cooling as well.

Why is the smaller X-125 sometimes more expensive than the larger X-200? Because the older X-series is end-of-line, and pricing on remaining stock moves around in ways that no longer track capacity or features. It is not a sign that the X-125 is the better machine. The current X-300 and X-350 are cheaper than both, quieter than both, and cheaper to run — which is the simplest reason to start there.

Prices and availability change often. Check the latest price on each product page before you buy.