COWAY Air Purifier with HEPA Filter, Ionizer, Best Choice by Wirecutter, Removes 99.999% of Harmful Particles up to 0.01µm for Allergies, CADR 421m³/h, ap-1512hh MIGHTY (Black)

I purchased this in July 2022 and it’s been on pretty much continuously 24/7 ever since.My partner has all sorts of allergies and suffers a lot, having to take antihistamines etc especially at night in the summer time. We also have cats and ongoing battle with mould in the house.Since using this product I’ve seen a dramatic improvement in my partners symptoms, so I’m sure it works! The amount of dust, cat fur and other nasty things that accumulates on the washable pre filter is disgusting! I regularly vacuum the house so it’s surprising the amount that this collects. The pre filter is washable and manufacture recommends cleaning every 2-4 weeks. Easy to do I usually just wipe it off and run it under the tap.It has an indicator to tell you when to replace the odour and hepa filters. The indicator is smart and is based on actual usage as opposed to fixed amount of time.The filters aren’t the cheapest, I just paid £40 directly from the manufacturer for a hepa filter and 2 odour filters. Considering this will last me a year that’s about £0.11 a day which given the benefits of using this is well worth it.. I haven’t tried aftermarket filters, I wouldn’t this product is very well engineered and I wouldn’t trust any cheaper 3rd party filters to be 100% as effective.The air quality sensor is incredibly good and reacts so quickly. I no longer smoke but use vapes, if I take a couple of puffs over the other side of the room it notices immediately and speeds up to filter. Changing bedding it always goes red and speeds up. Opening loft hatch it went red. There’s always a reason why and it never does it randomly which is good.It’s quiet on the lower settings. I run it in auto mode. It’s a bit noisy when it goes into high speed but it doesn’t ever stay there for long as it’s so powerful it quickly clears the contaminants.It’s a decent size, you need to make sure to leave some space around it to for it to work properly.Quality is great.If there could be one improvement it would be on the air intake cover. Dust sticks there and it’s awkward to clean. I ended up taking it apart which I don’t think the manufacture intended. It’s only a few screws but there’s a small magnet that fell out without me noticing. This magnet is essential for it to work it tells the machine the cover is on. Now I know it’s there it’s no issue to take apart and clean.

After plenty of research, I settled on the Coway Airmega Mighty, and it’s been a genuinely impressive bit of kit. The air feels fresher within a few hours of switching it on, and as someone with allergies and mild asthma, I’ve noticed I’m sleeping better and waking up clearer.Set-up is as simple as it gets – just plug in and go. It has four fan settings (low, medium, high, and auto), and I tend to keep it on auto so it adjusts itself as needed. The top-mounted controls are responsive and clearly labelled, and if the glowing air quality light is distracting at night, you can turn it off easily by holding a button.I live in a small bungalow, and keeping the unit in the central hallway works well for the whole space. It’s light enough to move between rooms, and I sometimes reposition it if a particular area needs attention.Now, a word of warning: if it detects poor air quality and ramps up to high, it can be very loud—like a mini jet engine kicking in. It’s effective, but you’ll definitely hear it. If it goes off at night in a bedroom, prepare to be woken up! That said, I’d rather have a moment of noise than breathe in nasties.Design-wise, it looks sleek and modern, though let’s be honest—it does resemble the front of a washing machine. It’s quite deep, too, with the air outlet sticking out at the back, so measure your space carefully.The filters last well (officially up to a year), but I give mine the occasional hoover to stretch them further. If you’ve got pets, expect to replace the filters more frequently—a friend with dogs recommended this to me and they burn through filters a lot faster.Pros:✅ Fresh air fast – Noticeable difference in hours✅ Great for allergies and better sleep✅ Easy to use – Plug in, hit auto, done✅ Stylish controls, light can be disabled✅ Decent filter life + easy to extend with a vacuum✅ Excellent value compared to competitorsCons:❌ Gets loud on high – Be prepared for some noise if the air quality dips❌ Chunky depth – Sticks out from the wall more than expected❌ Looks more functional than decorativeFinal Thoughts:If you want a powerful, no-nonsense air purifier that actually improves your home’s air quality, this is a brilliant choice. Just don’t expect it to whisper if your air is bad—and give it some breathing room, because it’s bigger than it looks in the pictures.Would I buy it again? 100% yes. I already recommend it to friends.

Negatives:- At full speed, there's a kind of cross between a whistling and hooting noise. Coway support confirmed that this is normal, but in my opinion is a bit of an engineering fail.- The air quality lights are different colours versus the Coway Airmega 150. Products from the same company should have the same colour sequence. (This unit goes blue -> purple -> red, and the Airmega 150 goes blue -> green -> amber -> red.)- It's not obvious which way the filter (one side of which is green) goes. It has an arrow saying front on it, but that could mean pointing to the back of the machine or pointing outwards of the front. The manual for this unit doesn't say which way it goes either and I had the filter installed the wrong way round for quite a while until I bought an Airmega 150 which does mention the correct way round in the manual. Incredible that this bit of important information is just missing. FYI, the green side should be facing out of the front.Good points:- Seems to do a good job of cleaning the air.- Air sensor seems to work.- Has a nice carry handle and is easy to move around.- Has a timer (though I would expect this as standard on all air purifiers. Sadly, Coway disagrees and the Airmega 150 doesn't have a timer).Overall, it seems like a very good air purifier. I lack the equipment to actually test the difference that it makes to air quality, though am confident it does a good job just through breathing the air. It's a shame it's let down by a poor manual, whistling noise at top speed and lack of air quality light consistency between Coway units.