Blueair - Classic 405
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Reddit Reviews:
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Based on 1 year's data from Feb 24, 2026 How it works
Liked most:
14
0
"it's fantastic in keeping the farm smell to a minimum."
"it’s majorly helped w allergies and dog smell"
"HEPASilent tech is real — gets dust, mold, pollen, pet funk, all of it"
20
0
"it’s majorly helped w allergies and dog smell"
"HEPASilent tech is real — gets dust, mold, pollen, pet funk, all of it"
"has substantially lessened my seasonal allergy symptoms while in the house"
5
0
"They're incredible and the best thing is that they have this washable cloth sleeve (pre filter) that goes over the entire intake which happens to wrap all the way around. ... It does such a good job that the actual internal filter stays significantly cleaner and doesn't need to be cleaned or changed as often. ... It's a game changer."
"Blueair imo because they have washable prefilters, and pet hair and dander is large and honestly doesn't need HEPA filters to clear it out the way, say, smoke does."
"Blue air. The prefilter is washable."
9
0
"They are all basically noiseless. ... They're sooooo silent. ... The only time it runs is when we cook or something or I light a black wick and it turns on"
"Our favorite is the BlueAir in our bedroom - we keep it on auto mode 24/7. It’s super quiet and seems to work well."
"the BlueAirs are the only ones whose fans have stayed smooth and quiet."
6
1
"have had mine for years and run it 24x7"
"the only ones whose fans have stayed smooth and quiet. ... i have owned 8 over 5-6 years at least without one single issue."
"the BlueAirs are the only ones whose fans have stayed smooth and quiet."
Disliked most:
3
2
"OTOH, the two Blueair purifiers are on all the time and we have ***not*** noticed a decrease in the rate at which dust accumulates on the woodwork in the house."
"Maalikabok pa rin kahit super sealed yung unit."
1
3
"the larger sizes have significantly more expensive filters"
"Those filters are crazy expensive, so that purchase turned into quite the "investment"."
"BlueAir is ok but the filters are small and replace more often."
0
1
"I don’t like they have an ionizer that you can’t disable. ... Ionizers create ozone, and when ozone reacts with different molecules it creates all kinds of new compounds that can’t be predicted."
1
2
"Blue air is the best of the three, also isn’t HEPA but has a static generator which bothers some people."
"Although you'll find complaints it doesn't use a "real" HEPA filter"
"Blue air is the best of the three, also isn’t HEPA but has a static generator which bothers some people."
0
1
"the auto setting barely did anything unless I literally blew smoke at them"
"Their sensors suck"
IamoneofScottsTots 1.0We have the 211 Max and we also have the classic 405. I have a tiny 411 in my office.
SpookyScaryClown 0.1Made this small flowchart for a friend who kept sneezing through spring but wouldn’t commit to buying an air purifier Step 1: Identify the enemy Is it pollen? Dust? Pet dander? The ghost of springtime past? Yes, yes, and probably yes. Step 2: Must have criteria for air purifier \- can it actually trap allergens? \- won’t sound like a jet engine in baby’s room? \- easy on maintenance? \- doesn’t cost the soul of your firstborn? (ironic but important) Step 3: I went down the rabbit hole Compared Coway vs Levoit vs Dyson vs Honeywell vs one that looked like a spaceship BUT... nothing could compare to [blueair air purifier](https://rantsreviews.com/dp-B073WJL99W) \- Covers big spaces (so your nursery + more = chill) \- HEPASilent tech is real — gets dust, mold, pollen, pet funk, all of it \- Washable pre filter = less guilt about killing the planet \- Doesn’t wheeze like a dying robot at 2am \- Design lowkey slaps too Step 4: Baby sleeps better. You sneeze less. Partner doesn’t threaten to move to the forest. Life improves. You win!!!
MysterySkanker 0.0I have tried and gotten rid of Bluair and levoit- just inadequate performance and louder than I like. I replaced them with Medify and have been very happy with the switch. If memory serves I have an ma-50 in the living room and ma-40 is each bedroom.
9ine6ix5ive 0.0I have BlueAir in all my rooms. Makes a significant difference for me.
Acceptable-Basil4377 0.0It helps a lot. I bought it due to smoke but I’m happy to get rid of cooking and dog smells. I have one from Blueair.
accountaholic26 0.0We love our blueair also. Got a dog a month ago and happy to hear from guests our house doesn’t have a dog smell.
Adorable_Dust3799 0.0I love my blueair. It's highly rated for the price, and has a cloth sleeve you wrap around the outside and toss in the wash that prefilters out the husky fluff. If your pup is smelly it's probably oily, and needs either more roll in leaves and dirt time or more frequent bathing. A simple rub with a damp cloth frequently, like daily if you're not using soap, will work wonders.
Affectionate_Bus_884 0.0I’ve been using blueair purifier. I have 5 of them a few I’ve owned for over 4 years and I love them.
Agent_03 0.0Sorry, what "air quality problems"? Can't say we've noticed any, with our 3 air purifiers running 24/7 in a one-bedroom apartment... 😉 (Both of us have pollen allergies and one of us has asthma.) That should answer your question. Seriously, buy an air purifier. Once you feel the difference you'll probably end up getting a few more. We've got two of the medium Coway models (Airmega AP-1512HH or 200M) and a smaller BlueAir. They also help with smells -- bathroom, pet, or cooking. Highly recommend the Coways because they: * Are whisper-quiet on all but the highest setting, and can auto-adjust (though we usually leave them on medium because they get loud if they kick into high). * Move a lot of air for their size * Have filters that last way longer than they're rated for (as long as you clean the prefilter) * You can turn the main light on the purifier off for use in a bedroom at night Tip: it's better to get several medium air purifiers and put one in each room or area rather than getting just one big one.
alliusis 0.0There's also the Winix D360/480 series as a Home Depot exclusive, which doesn't have ionizers and has a pretty high CADR rate. I don't think there are after-market filters but Winix said they continue to manufacture filters for 10 years after so maybe you won't have problems. I'm eyeing it. Honestly my first air purifier was BlueAir and I loved it. Dead silent on the first setting (I think having a vertical fan helps), and I could run it on the high setting all day. I have birds and had no idea about the ionizer though. I've gone through one Honeywell which made my room smell like a plastic pool toy, and I'm not so happy with the return-replacement either, I ran it on turbo today and got a pretty big headache and felt like I was having trouble breathing, which sounds insane but it stopped when I turned it off. I'm almost tempted to just go get another BlueAir and remove the ionizer manually, but I also know that their CADRs are based off of ionizer on, and the larger sizes have significantly more expensive filters.
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