DREO Smart Air Purifier DR-HAP009S Review: quiet, efficient, but not magic on smells

I’ve been running this DREO Smart Air Purifier (model DR-HAP009S) in my bedroom and living room for a bit, swapping it between the two to see what it really does. On paper it looks pretty strong: HEPA filter, PM2.5 sensor, Wi‑Fi, Alexa, 269 m³/h CADR, and supposedly ultra quiet. In real life, it’s basically a chunky white tower that sits in the corner and hums away in the background. If you’re expecting some sci‑fi gadget that instantly makes the air feel like a mountain cabin, that’s not what this is. It’s more of a slow, steady helper.

First impression when I unboxed it: it’s bigger than I thought. The footprint is still reasonable (about 24 x 24 cm), but the height makes it feel like a small bin or a short tower fan. Not ugly, just… present. Setup was straightforward: pull off the plastic from the filter, plug it in, and it starts working right away. Getting it on Wi‑Fi and into the Dreo app took about 5–10 minutes, including the usual email code and 2.4 GHz Wi‑Fi dance.

I mainly wanted it for dust, pollen, and general stuffiness in the bedroom. I’m not a hardcore allergy sufferer, but I do wake up with a blocked nose sometimes and we have a cat that sheds. I also cooked a couple of smoky meals and let some kitchen smells drift into the room just to see how it reacted. The built‑in PM2.5 sensor and the colour ring on the front are actually useful for that — you can see when the air is bad without guessing.

Overall, my early takeaway: it feels like a practical, fairly quiet purifier that does its job in the background. It’s not perfect, and it’s not tiny, but it seems to genuinely improve air freshness and reduce dust. If you’re buying it mainly to erase strong smells instantly, you’ll probably be disappointed. If you want something that quietly cleans the air all day, it makes more sense.

Price‑wise, this DREO usually sits around the mid‑range for smart purifiers with HEPA filters and app control. It’s not the cheapest basic box on the market, but it’s also not in the super high‑end Dyson territory. For what you pay, you’re getting: a decent CADR, very low noise in Sleep/Auto at low loads, smart features that are actually useful, and a brand that already has a few fans and decent reviews (around 4.6/5 at the time of writing).

Compared to cheaper, non‑smart purifiers I’ve used, the main upgrades here are the PM2.5 sensor, proper Auto mode that reacts to the environment, and the app scheduling. If you don’t care about any of that and just want a simple on/off fan with a filter, you could save money and go for a dumb unit. But if you like being able to see numbers, run reports, and control it from bed or via Alexa, then the extra cost makes more sense.

The main question is: what are you buying it for? If it’s to help with allergies, dust, and general air freshness, I’d say the value is pretty good. It actually helps, and you can run it quietly 24/7 without going crazy from noise. If your main goal is to nuke strong smells instantly, you might feel a bit let down and think, "I just spent over a hundred quid and the cat smell is still here" — because that’s not really its strength.

Taking into account the ongoing filter cost, the size, and the real‑world performance, I’d rate the overall value as solid but not mind‑blowing. You’re paying for a well‑rounded, smart, quiet purifier from a known brand. There are cheaper options if you cut features, and there are fancier ones if you want design or more bells and whistles. This one sits in a sensible middle ground.

Design‑wise, DREO clearly tried to make this look like a modern gadget and not some hospital machine. It’s a white, rounded tower with a clear lower section where you can see the filter. The top has the touch controls and air outlet, and the front has a simple LED display with the PM2.5 value and a colour ring (blue/green/orange/red) for air quality. In a bedroom or living room, it blends in pretty well — it looks nicer than a lot of clunky purifiers I’ve seen.

The catch is the size. At about 39 cm tall and 23.8 x 23.8 cm footprint, it’s not tiny. Think "small bin" or a short tower fan. If you live in a small flat or your bedroom is already crowded, you’ll notice it. I had to shift a side table a bit to fit it where I wanted, about 30 cm from the wall so it could breathe. It’s not super heavy (around 3 kg+), so moving it between rooms is doable with one hand, but it’s not something you’ll want to drag around every day.

One thing I liked is the clear filter window at the bottom. You can actually see how dirty the filter gets over time, which is strangely satisfying and also a good reminder that it’s doing something. The controls are straightforward: power, mode, fan speed, display lock, etc. No weird icons that make you guess. The only design annoyance for me is the always‑on light ring in normal mode. It’s bright enough that in a totally dark bedroom it’s a bit much — sleep mode fixes it, but if you forget to switch it before dozing off, it’s a bit annoying.

Overall, I’d call the design clean and practical, but definitely not compact. If you want something tiny to sit on a desk, this isn’t it. If you’re fine with a floor unit that looks decent and doesn’t scream “industrial”, this does the job pretty well.

For me, "comfort" with an air purifier mostly means noise and how annoying it is to live with. This is where this DREO does pretty well. In Sleep mode, it’s genuinely very quiet. They claim 18 dB; I don’t have a meter, but subjectively, it’s a soft airflow sound that disappears into the background after a few minutes. I’m a light sleeper, and I could leave it on all night without it bothering me. The display also dims in Sleep mode, so you don’t have a huge glowing circle in your face.

In Auto mode at low pollution levels, it behaves almost like Sleep mode. The fan sits at a low speed, and you barely hear it. When the PM2.5 reading jumps (cooking, opening a window to a busy street, spraying something), the fan ramps up. At medium speed, it’s audible but not annoying — like a quiet fan. At Turbo, you definitely hear it; it’s not jet‑engine loud, but I wouldn’t watch a quiet movie with it on full blast right next to me. For quick clean‑ups, it’s fine, but I wouldn’t run Turbo all day in a small room.

Day‑to‑day, the unit is pretty hands‑off. I ended up setting a simple schedule: Auto during the day, Sleep at night. Once that’s done in the app, you mostly ignore it. There’s no weird smell from the filter, no rattling, and no random beeps in the middle of the night. The only minor comfort downside is the Wi‑Fi setup step: it forces you to connect it to your network if you want full control, which some people will find a bit of a faff. If you hate apps, you can still use it manually, but you lose some of the nice-to-have features.

From a "living with it" point of view, I’d say it’s easy and low‑stress. You plug it in, pick a mode, and mostly forget about it. Just be aware that if you’re super sensitive to any fan noise at all, you’ll want to stick to Sleep mode, especially in the bedroom.

In terms of build quality, the DREO feels decent for the price bracket. The plastic doesn’t feel premium, but it also doesn’t feel cheap or creaky. The body is solid enough, the top grille doesn’t flex under a normal push, and the filter compartment opens and closes without drama. I moved it around the flat quite a few times by the top edges, and nothing rattled or felt like it was going to snap off.

The main long‑term cost with purifiers is always the filter. This uses a 3‑in‑1 HEPA‑grade filter with a carbon layer. DREO tracks filter life in the app and on the display, and you’ll get a reminder when it’s time to replace it. How often depends on how dirty your air is and how long you run it. With daily use in Auto/Sleep, I’d expect something like 6–12 months per filter, but that’s a guess based on other purifiers I’ve used, since I obviously haven’t run this for a full year yet.

One thing I like is that DREO is a known brand with multiple purifiers on the market. That usually means replacement filters will stay available for a while, unlike some random no‑name purifier where you can’t find filters a year later. Before buying, I’d still check the price of the replacement filter on Amazon or Dreo’s site, because that can change how "good value" this is in the long run. If filters are pricey, the total cost over two or three years adds up fast.

I didn’t notice any weird heating, buzzing, or app crashes that would make me worry about reliability. The motor seems smooth, and the fan speeds change cleanly. Of course, long‑term durability is something you only really know after a year or two, but based on the build and the brand, I’d say it feels reassuring enough. Just go in knowing you’re signing up for ongoing filter costs and that you should clean the outside and pre‑filter area every now and then to keep airflow good.

This is the part that actually matters: does it improve the air or is it just a fancy white box with lights? In my case, it did make a noticeable difference, but with limits. After a few nights in the bedroom on Auto/Sleep, I woke up with less of that heavy, stuffy feeling. Dust on surfaces seemed to build up a bit slower too. I also get mild sneezing fits some mornings, and those were reduced when I left this running in the room all day. Not gone, but less frequent and less intense.

The PM2.5 sensor seems reasonably sensitive. Simple example: I opened the window facing a road, and within a minute, the PM2.5 number climbed and the light ring turned from blue/green to orange. I closed the window and left it on Auto; after about 10–15 minutes, the number dropped back down and the light went blue again. Same thing with cooking: when some kitchen smoke drifted into the living room, the unit reacted and the fan kicked up a notch. So the sensor isn’t just for show.

Now, about smells. If you’re hoping it will instantly clear nasty odours, that’s where it’s a bit underwhelming. Normal household smells (mild cooking odours, a bit of pet smell, slightly stale air) get reduced over time, and the room ends up smelling more neutral. But strong, sharp smells — like a cat accident or heavy cooking — are not magically gone in five minutes. The carbon part of the filter helps, but you still need to ventilate and clean. This lines up with what one of the other reviewers said: it’s mainly a particle remover, not a gas eraser.

For larger rooms, the 269 m³/h CADR is decent. In my medium‑sized living room (maybe 25 m²), running it on Auto or medium speed kept the PM2.5 readings in the "good" zone most of the time. If your space is close to the 100 m² they advertise, be realistic: it’ll still help, but it won’t refresh the whole area instantly unless you run it harder and longer. Overall, for dust, pollen, and general air freshness, it’s pretty solid. For strong smells, it’s just okay — it helps, but it’s not a miracle machine.

On the spec sheet, this thing is pretty stacked: 269 m³/h CADR, coverage up to about 100+ m² (realistically less if you want fast cleaning), HEPA‑grade 3‑in‑1 filter, PM2.5 sensor, app control, voice control with Alexa/Google, and an AHAM verification, which means an independent lab actually tested the performance. It’s rated at 0.3 µm particle retention, so it should catch the usual dust, pollen, pet dander, and a good chunk of smoke particles.

The modes are simple enough: you get 4 fan speeds and 4 modes: Auto, Sleep, Normal, and Turbo. Auto is the one I used the most; it uses the PM2.5 sensor to decide fan speed. When the air is good, it drops to a very low, almost silent speed. When I cooked something smoky or sprayed deodorant, you could see the PM2.5 number jump and the fan ramp up. Sleep mode locks it at a very low speed, turns off the bright display, and keeps the noise at a whisper level.

The app gives you some extras that are actually useful and not just gimmicks. You can:

• Check real‑time PM2.5 values
• See a 30‑day air quality trend (basic graphs, but nice to have)
• Schedule on/off times
• Adjust fan speeds and modes
• See filter life and get replacement reminders

In daily use, I ended up using the physical touch controls for quick changes and the app mainly for scheduling and checking the PM2.5 reading from the sofa or bed. Alexa integration works fine — "Alexa, set air purifier to sleep mode" became a standard move at night. Nothing fancy, but it’s convenient.