
Running these analyses costs money. Buy through my links to help keep lights on! I may get a small commission.
Reddit Reviews
I’ve had my Alen Fit50 for close to 15 years. At one point it broke and they replaced it for free. I keep a filter subscription which I believe is what you need to keep the lifetime warranty now. It’s been great and when I need another I plan on buying an Alen.
I have two Fit50 units - one in the main living space in my house between the living room and kitchen, the other in our bedroom because it’s a large room and our dogs sleep in there with us - and the other four are T500’s, three of which are in my kids bedrooms and the fourth is in the upstairs family room. We live in southern Texas where everyone is allergic to something no matter what time of year, and spring is referred to as “the pollening”. I’ve had generally well-controlled asthma since I was a kid, and allergy tests in 2015 concluded that dog dander was an issue for me. I bought mine when the company wasn’t a name people recognized and they had some great deals on multiple units. Because they’re so reliable, I’d feel entirely comfortable purchasing a refurbished unit, and at the price difference it’s the only way I’d go if I needed another one. The only thing I can’t speak to is their customer service - which is ironically the best reason to invest in them - because I’ve never once had to contact them. I’ve also got four different friends/neighbors nearby who also have pets and allergies and bought them after being in my house, and they all still religiously use theirs. If that’s not enough of a pitch, two of my kids are teen boys and one has had a guinea pig for five years. Between the sour onion funk and guinea pig stank, the only time their rooms smell is when they dare to turn their units off. These things are freaking magical.
Not a Dyson. Seriously. Alen, Coway or winix.
Dyson in general is not known for high quality especially for the price they charge. Also their customer service is shit. The other 3 I listed are much better options. You’ll want as much carbon in the filter as possible. Alen VOC for example.
Longtime allergy sufferer. Alen air purifiers are the gold standard. Choose the BreatheSmart model that is one level ABOVE whatever your room's square footage is, and chose any filter designed for allergens or wildfire smoke. Keep the fan on the thermostat running (with or without A/C) and buy the best filter for your HVAC.
I bought the Alen BreatheSmart 9 years ago for $500 - a big investment. At the time I was desperate for allergy relief and it delivered. It's still going, no regerts.
Not smart but I have two Alens and absolutely love them. I've had an older Breathsmart for 6-7 years and still works great. Recently bought a smaller one for my gym/mancave and it's also great. Won't look for another brand if I needed another one.
I have 6 Alens. 2 x BreatheSmart 75i, 2 x BreatheSmart, a T500, and a Paralda. I like them. They are quiet, the sensors (on the 4 bigger ones) seem to be accurate and ramp up cfm when air quality calls for it. I live in the lightning capital of the world... God's Lightning Rod, FL. I had 2 older ones that got hit and the LEDs went out. It still worked fine, it was just the little LED bulbs that didnt work. They sent me 2 new units with no hassle. The filters are not cheap, but I am happy with how long they last and how they perform. I'd 1000% buy from them again.
I have air purifier in every room. The Coway mighty is less expensive and takes in a fair amount of fur, you need to vacuum the prefilter weekly. Running a robovac twice a day, we have Roborock Q5 max+, keeps the large dust bunnies away. I’ve found that air purifiers like Coway Mighty and the Alen Breathsmart (more expensive but we have it too) take in larger stuff like hair because of the open design of the filter intake.
Rankings by Use Case
Top recommendations from others in the same boat
Best for Car and vehicle use

Top pick
TEQOYA - Nomad
Best for Construction dust mitigation

Top pick
CleanAirKits - Corsi-Rosenthal Box
Best for Heavy smoke and odors

Top pick
Coway - Airmega AP-1512HH Mighty
Best for Homes with shedding pets

Top pick
Winix - 5500-2
Best for Large open rooms

Top pick
Coway - Airmega 400
Best for Quiet bedroom use

Top pick
Coway - Airmega AP-1512HH Mighty





