Devola 5‑in‑1 WiFi 10000 BTU Review: a compact workhorse for small rooms (if you can live with the noise)

I’ve been using the Devola 5‑in‑1 10000 BTU unit for a few weeks in a UK semi, mainly in a 20–22 m² bedroom and occasionally rolled into the living room. I bought it because last summer was rough, and I wanted something that could cool properly, not just blow lukewarm air like a cheap fan. The heating, dehumidifier and WiFi were bonuses on paper, but I was mainly after solid cooling.

First clear point: it cools well for its size. Once the exhaust hose is properly fitted to the window kit and the door is shut, the room temperature drops in a noticeable way within about 20–30 minutes. On the hottest day I’ve had so far (around 28–29°C outside), the bedroom went from 27°C down to about 22°C in just under an hour, which is honestly all I need to be comfortable.

The flip side is the noise level. The spec sheet says 65 dB and it feels like that. It’s not a gentle background hum; it’s more like a loud extractor fan plus a fridge compressor. For watching TV or working with headphones, it’s fine. For sleeping, at least for me, no chance unless it’s in the next room or on the landing with the door half closed. If you’re sensitive to noise, this is the main thing to think about.

Overall first impression: it’s a practical, no-nonsense unit that actually cools, but it’s not discreet and it’s not magic. It’s a 10000 BTU portable AC on wheels with some extra modes. If you go in expecting that and not silent central air, you’ll probably be happy enough with it.

On value, you have to look at what you’re actually getting for the price: 10000 BTU cooling, heating, dehumidifying, fan, sleep mode, WiFi control, and two window kits. Compared to some big-name brands with similar specs, the Devola usually comes in cheaper, which is why I gave it a shot. For a mid-range budget, it feels like good value if you really use the cooling and dehumidifier features regularly.

Where the value is slightly less convincing is if you’re mainly thinking of it as a heater or a fancy fan. In that case, you could buy a normal electric heater and a decent pedestal fan for less, with less noise and no hose. The strength of this unit is that it can properly cool a small room, and that’s what you’re paying for. The dehumidifier mode adds some extra utility if you have a damp room, a conservatory or pets in a warm space, like the person using it for rabbits in a conservatory – that’s exactly the kind of scenario where this makes sense.

The noise is the main thing that slightly drags down the value for me. The product itself performs well, but if you were hoping for quiet cooling while you sleep, you might end up feeling you spent a fair chunk of money on something you can’t use at night. If you’re fine running it before bed, or placing it on a landing or in an adjacent room, then you get more out of it and the price feels justified.

Taking everything into account – performance, build, features and the Amazon rating hovering around 4.1/5 – I’d say it’s good value for money for small to medium rooms if you accept the noise and don’t expect miracles from the heating mode. There are quieter and more refined options out there, but they usually cost more or need proper installation. For a plug-in, roll-around unit with WiFi and solid cooling, this one sits in a sensible spot.

Design-wise, this Devola is pretty straightforward. It’s a white, fairly slim tower-shaped unit: 29 cm deep, 30 cm wide and 67 cm high. For a 10000 BTU unit, it’s quite compact, which is one of the reasons I picked it over some chunkier models. It fits in a corner of a small bedroom without blocking everything, and it slides beside a sofa in the living room without too much drama. It weighs around 24 kg, so it’s not light, but the wheels roll well on hard floors and short-pile carpet.

The front panel is plain with a small display and a few physical buttons on top. Nothing fancy, but easy to understand: power, mode, fan speed, temperature up/down and a timer. I prefer this to over-complicated touch panels. The air outlet is on the front with a manual louvre you can tilt up or down. There’s no motorised swing left/right, so if you want to direct the air across the room, you’ll need to angle the whole unit a bit.

The back is where the exhaust hose connects and where the washable filter sits. The hose is pretty standard plastic, not especially sturdy but not flimsy either. It locks into place with a twist ring, and once it’s on, it stays put. The only slightly annoying design bit is the hose plus window kit combo – like all portable ACs, it makes your window area look a bit DIY, with a big white hose sticking out. If you’re expecting something discreet or stylish, this isn’t it.

In daily use, the design feels focused on function more than looks. The handles on the side make it easier to lift a step or two, the wheels are solid, and the control panel is simple. I wouldn’t call it pretty, but in a corner of a bedroom or office it just looks like another white appliance, which is fine by me.

From a comfort point of view, the big question is: can you sit or sleep in the same room with it running? For daytime use, yes. The cool air output is strong, especially on high fan speed, and it makes a noticeable difference in how the room feels. If you’re working at a desk or watching TV, you’ll feel the air quickly if you’re in line with the outlet. I found that setting it to around 22–23°C and medium fan speed kept my 20–22 m² bedroom comfortable even during a warm afternoon.

For sleeping, it’s more complicated. The noise is a constant issue. Even in sleep mode, with the lights off and the fan supposedly quieter, it’s still a fairly loud hum plus compressor noise. Personally, I can’t sleep with it in the same room on cool mode. What I ended up doing was running it hard for 30–45 minutes before bed with the door closed, then turning it off when I go to sleep. The room stays cooler for a while, and that was a decent compromise. If you’re a heavy sleeper or used to sleeping with a loud fan, you might tolerate it better than I do.

The airflow itself feels comfortable. It’s not bone-dry or harsh like some older AC units I’ve used. The self-evaporating system seems to help, and I didn’t wake up with a dry throat when I used it earlier in the evening. The adjustable thermostat from 16–32°C gives you plenty of range, but realistically, for comfort, I stayed between 20–24°C. Anything lower just makes the room feel like a fridge and the compressor runs non-stop.

One more thing on comfort: heat mode. On a chilly, damp evening, the heater function takes the edge off in a small room, but it’s not as comfortable as a proper radiator because the hot air comes out in a stream from one point. It’s useful as a backup or for a conservatory or office that doesn’t have heating, but I wouldn’t rely on it as a main heater. So overall, comfort is good in terms of temperature, but the noise is the trade-off you have to accept.

In terms of durability, after a few weeks of regular use, nothing has fallen apart or started rattling in a worrying way. The plastic casing feels mid-range: not premium, but not flimsy to the point where you’re scared to move it. I’ve rolled it between rooms quite a few times, and the wheels and side handles have held up fine. The exhaust hose hasn’t cracked or come loose, which is good because that’s usually the first weak point on cheaper units.

The washable air filter at the back is easy to remove and rinse. Devola recommends cleaning it twice a month, and that sounds about right if you’re using it a lot. The filter frame doesn’t feel super tough, so you don’t want to yank it around, but treated normally it should last. The buttons on the top panel and the remote haven’t shown any weird behaviour or missed presses so far.

I can’t pretend I’ve stress-tested it for years, but the overall impression is of a solid, basic appliance that should last a few summers if you look after it. The compressor and fan both sound consistent – no odd squeaks or grinding noises. I did have one small rattle at one point, but that turned out to be the hose ring not fully tightened; once I fixed that, it went back to normal.

With the brand offering up to a 2-year warranty and decent support on paper, I’m reasonably confident about the lifespan. It doesn’t feel like a cheap throwaway unit, but it’s also not built like industrial gear. For home use in summer and a bit of dehumidifying and heating in shoulder seasons, I’d say the durability is pretty solid for the price bracket, as long as you’re not dragging it up and down stairs every day.

Performance-wise, the first thing you notice is how quickly it starts throwing out cold air. Within a couple of minutes of switching to cool mode, the air from the front vent is already much cooler than the room. The compressor cycles on and off depending on the set temperature, and when it kicks in you hear a clear step up in sound. This is pretty normal for portable AC units, but worth mentioning if you’ve never had one before.

The official noise level is listed at 65 dB, and that matches my experience. It’s roughly like a loud cooker hood or a strong bathroom extractor, with an extra low hum from the compressor. On low fan speed it’s a bit calmer, but the compressor noise is still there. So in terms of performance vs noise, it’s a trade-off: you get strong cooling and fast response, but you pay for it with a constant background roar. If you’re planning to cool a landing or hallway and let the cool air drift into rooms, that can be a good workaround.

Power consumption is quoted around 1114 W for cooling, with an energy efficiency rating of A and a SEER of 3. In practice, running it for a few hours in the evening is noticeable on the bill but not ridiculous. It’s not the cheapest thing to run, but compared to larger fixed AC systems it’s relatively manageable. I tend to use it in short, focused bursts: cool the room hard, then turn it off or drop to fan mode. Used like that, it feels like a good balance between comfort and cost.

The WiFi and app control are part of the performance story too. Being able to start it before you get home means it doesn’t have to run all day, which helps with both noise and electricity use. The app isn’t fancy, but it works: you can change modes, set temperatures and timers, and check if you accidentally left it on. Overall, performance is solid for a 10000 BTU portable unit. It does what it says, just loudly.

Out of the box, the Devola comes with the main unit, two different window kits, the exhaust hose, a small remote and the usual paperwork. The window kits are a decent bonus. You get a flexible sash-style kit and a long secondary kit (about 3 m) that’s basically a fabric panel with a zip for the hose. I used the fabric one with a tilt-and-turn window and, once taped a bit around the edges, it did the job. It’s not pretty, but it stops most of the hot air coming back in.

The remote is basic but functional: you can switch modes (cool, heat, fan, dehumidify, sleep), change temperature, fan speed and set a timer. The buttons feel a bit cheap, but they respond and the range is fine across a normal-sized room. The display on the unit itself is clear enough and shows the set temperature and mode. You don’t need the app to use it day to day; the physical controls are enough.

Speaking of the app and WiFi: setup is a bit fiddly. It only works on 2.4 GHz, so if your router combines 2.4 and 5 GHz under one name, you might have to dig into your router settings to split them. Once connected, though, the app is handy. I mainly use it to turn the unit on 20–30 minutes before I get home or to switch modes without getting up. Voice control via Alexa works, but it’s more a novelty than something I rely on.

In terms of overall package, you’re getting a multi-function machine that’s clearly built to cover British weather swings: cooling for summer, heating for chilly evenings, dehumidifying for damp rooms. None of the extra modes feel fake; they all work, just with the usual limits of a portable unit. It’s not premium, but everything you need to get going is there in the box, which I appreciated.

On raw performance, this is where the Devola holds up pretty well. As a cooling unit, 10000 BTU for a space up to about 26 m² feels honest. In my 20–22 m² bedroom with average insulation, it dropped the temperature by around 4–5°C within an hour on a warm day. In a slightly bigger open-plan area (around 28–30 m²), it still helped, but more like taking the edge off rather than making it properly cold. So if your room is close to the 26 m² limit and poorly insulated, don’t expect miracles, but it still does a decent job.

The dehumidifier mode is surprisingly useful. It’s rated at 33 L/day, and while I didn’t measure exact litres, I used it in a damp spare room for a few evenings. The air felt less clammy, and the musty smell reduced after a couple of days. Because it’s a self-evaporating system, you don’t constantly empty a tank in cooling mode, but in pure dehumidifier mode you may still have to drain it depending on humidity. For me, in a UK spring with moderate damp, it wasn’t filling up constantly, so it was manageable.

The heating mode works, but I’d call it a backup option rather than a full heating solution. It warms up a small room in maybe 20–30 minutes, but it’s not as efficient as proper fixed heating, and you still have the exhaust hose to deal with. If you’ve got a conservatory, a garden office or a room with no radiator, it’s handy. In my case, I used it to warm a 12 m² office on a cold morning and it did the job, but I stopped using it once the central heating came on because that was more comfortable and quieter.

Fan-only mode is basically a strong floor fan using the same outlet, without cooling or heating. I used this a couple of times when it wasn’t hot enough to justify full AC. It moves a decent amount of air, but honestly, if you only want a fan, a cheap pedestal fan is simpler and quieter. Where this unit is effective is as a proper AC and occasional dehumidifier. On those two, it earns its keep. Heating and fan are more like extras you might use now and then.