Blueair Classic 605 Portable Air Purifier – White

(15 customer reviews)
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  • Battle allergies, asthma and hay fever with HEPASilent technology which leverages electrostatic charge and mechanical filtration to deliver true HEPA performance capturing 99.97% of air airborne pollutants including dust, mold, pet dander, pollen.
  • Certified clean air delivery rate (CADR) of 500 cubic feet per minute with a superior, 5 air changes per hour
  • 3 fan speeds including whisper quiet operation allow you to breathe and sleep easier without disruption
  • Wifi enabled for control through your Blueair friend app and Amazon Alexa compatible
  • For large rooms between 700 square feet and 800 square feet (AHAM rated at 775 square feet) such as large bedrooms, living rooms, and kitchens
  • Dual Protection filters, sold seperately, provide an extra level of carbon filtration to remove odors and smoke including those caused by wildfires. All filters are recyclable and suggested to be replaced every 6 months depending on use



SKU: 605 Categories: ,


Made for large living spaces, the Blueair Classic 605 is perfect for rooms up to 775 sq ft.

Quietly capturing 99.97% of airborne particles down to 0.1 mircons in size including dust, mold, pet dander and pollen, Blueair’s patented HEPAsilent technology uses a unique combination of electrostatic and mechanical filtration which ensures that many of the airborne irritants that cause allergies and hay fever are captured in the most effective manner.

Providing performance you can count on, all Blueair purifiers are independently tested and verified by independent testing through the Association of Home Appliance Manufacturers (AHAM) for clean air delivery rate (CADR) and tested by the California EPA air resources board for no ozone emissions.

Casters come standard for easy mobility and a sleek new flip-top display for controls and filter change indicator light, so you’ll always know when to change your filter.

It is recommended to replace the filter every 6 months, depending on use and environment.

Specification: Blueair Classic 605 Portable Air Purifier – White

Weight42 lbs
Dimensions13 × 20 × 26 in






15 reviews for Blueair Classic 605 Portable Air Purifier – White

3.9 out of 5
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  1. superbaka

    I hate math and so do you, but with a little calculation and a couple hours of research, you can do a great job picking an air filter and weeding out marketing nonsense.First, the government CADR rating always has three levels that represent different *size* particles. They name them Dust, Pollen, and Smoke to represent big, medium, and tiny particles (of any kind!). The smallest, “Smoke”, represent those tiny HEPA particles such as many allergens. Therefore, if you are shopping for a HEPA filter, you should only focus on the Smoke CADR results.The second thing to know is that the government believes people with bad allergies need air exchanged in the room 4-5x per hour, and non-allergy sufferers 2x per hour, to make it worth it. Anything lower and the particles may fall to the ground on their own, or you may just not feel a difference. (Once they fall, I recommend a vacuum with a HEPA filter such as Miele). Their calculation includes an open door to another room, and results get much better with a closed door, but you still need fresh air so you don’t get overwhelmed with carbon dioxide imbalance so keep your door open a little.Finally, CADR is calculated on max fan speed. NOBODY uses their air filter on max, lets face it!! In fact, my goal is to run my air filter on low because I know I can totally live with it no problem.So now begin your shopping. Find the brands you trust or heard good word of mouth, and visit their websites and download their manuals. There you will usually find the CADR listed and the CFM output at different fan speeds. If only one CFM is listed it is for max speed, so you can look at the power use of the fan and calculate the CFM of different speeds proportionately. For example if the low power setting is 1/3 of the max, you are probably getting 1/3 of the advertised CFM on the low fan speed.Take the CFM output from Smoke listed in the manual and divide it into the cubic feet of your room. The blue air Classic 205 says low fan speed outputs 75 CFM for smoke sized particles. (Again, smoke size are the HEPA particles that matter). My bedroom is 12 x 12 x 8’, so I divide 75 CFM (low output) into (12*12*8) 1152, and I get about 15. This means it takes 15 minutes to clean the air. Per hour, I will therefore get 4 air exchanges. Perfect! I never have to go higher than low fan speed.Using this method, I discovered the Rabbit Air is totally useless on almost all settings. Of course people will say the low setting is quiet – its not getting the job done whatsoever. It needed a room so small nobody would live in. So make sure to use this formula and guesstimate or calculate the room you will use it in and the speed you will use. Don’t let them trick you! You may need to buy a larger air filter if you want the lower speeds to be practical. Some brands are pure marketing, and are useless on low speeds.Finally, the filter replacement usually follows the same rule of max fan speed and 24/7 use. Blue Air says I need to replace it in 6 months. Since I run mine 12 hours per day (overnight) on low, I can calculate the proportion. 75 CFM is 35% of the highest setting 220 CFM, so running it 24/7 would mean I don’t change the filter for about 17 months. Since I will run it half the day, I don’t change it for 35 months! Sounds right; if you google for when to change HEPA filters it says they “typically” need to be changed every 3-5 years. Boom. Saved myself a fortune.So far, the Blue Air is working great and has a smooth quiet sound. I will give it 5 stars if nothing goes wrong over time.Hopefully this helps you. Do your own due diligence and good luck–Update : After a year it is working the same as when I bought it so I moved to 5 stars. The app sometimes causes some trouble. I do not like companies that make you connect to the internet because they scrape your data. I believe the EULA says they upload your data to their servers which likely means it gets in giant correlative databases and sell it to unseen third parties, which is the basic business plan of Silicon Valley. For example, maybe people who live in Los Angeles who have their air filter turn on at bedtime who also recently bought fancy cheese are more likely to own a Tesla. This is the how Google and Facebook work and anyone who scrapes your data. I cannot be sure Blue Air does its well known companies are dying to get into your house (Google purchased Nest for this reason).I also wish I bought the smokestop filter because many times toxic smells came up such as weed killer accidentally used outside etc.

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  2. CAAmazoner

    I really wanted this Blueair Classic 205 for my home and family. In fact, earlier in the day, I had also purchased a Blueair 203 from HomeDepot. I figured I would need at least two for my home (I actually already own a number of Korean air purifiers).Unfortunately, both the Blueair 205 and Blueair 203 emitted a pesticide-like chemical smell as soon as I turned them on. The smell from the Blueair 203 was unbearable — it smelled like I was in a chemical factory. The smell from the Blueair 205 was more subtle, but still disturbing.I hope Blueair can address this issue — is it a manufacturing/design decision, is it related to the warehouses where the new units are stored and shipped, or what?

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  3. S. Burgess

    So far, so good! We run it on medium to keep it quiet. On high it makes a too much noise.The Blueair Friend app to run it SUCKS. They want way too much info and address info and this and that and this and that just to be comprehensive or stalk you or aquire saleable data on you, or, target you for a barrage of focused marketing products. Anyway, too many questions. All I wanted was to be able to control the schedule remotely and get alerts if the filter needs replaced. Keep It Simple, Stupid! It’s a friggin’ air filter. In the end, after getting so pissed at the invasive app, I just manually left the machine on medium and walked away.

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  4. I loves me some Amazon

    We’ve owned the Classic 205 in the bedroom for about a week and had the Classic 405 delivered yesterday for our apartment’s main living/kitchen area. These things are AWESOME! While a bit bigger physically than we would prefer, they’re great looking, almost completely silent on the lowest speed, and we felt a noticeable difference to air quality within a couple of hours. We’ve got two cats and live in an urban area with extremely poor air quality and can already visibly see particles gathering on the filter media.My one and only complaint is the WiFi connectivity and mobile app (Android version, not sure if it applies to iOS as well.) Learn from my pain: While not documented anywhere, these filters support only 2.4 Ghz wifi. If your phone is on a 5 Ghz band, change it before attempting to pair (you can change it back once your filters are on the network.) The app has a ridiculously bad pairing experience and will appear to not work at all — be patient! There is a firmware update happening at first, although the app displays zero indication of such. You’ll know things are working if you hear the filter turn off and back on after a few minutes. I ended up killing and restarting my app after that happened and found the filter was paired and ready to be renamed & configured. It’s too bad the only way to set up Night Mode or change the front LED brightness is via the app, because if I wasn’t a technology person I’d likely have thrown this all out the window. The initial app experience really is that bad — the fact that someone tested and signed off on it is incredible, especially for the high price these products demand.The online extended warranty registration is also awful on the website. It’s hosted by a 3rd party and has a form that mixed everything up at the end; I have no idea if it worked. I’ll try again via the mobile app later.UPDATE 2/4/2018: Now this device has started beeping irregularly, very faintly, and keeping us up at night. I just tried to submit a support request on their website and got the response “There was a problem with your form submission. Please wait 2592000 seconds and try again.” I’m starting to think this company has no reliable grasp on technology and am not sure I can recommend anyone purchase their products until they get their act together.

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  5. Retired of the New Forest

    I bought this item as I have asthma and cough considerably especially at night. I have used the product now for 3 weeks and I do think I cough less. I move it downstairs in the daytime and in my bedroom at night. On the first setting it is almost silent and it doesn’t bother me. When it is on, there is a blue light shining that I angle away or else it would be annoying at night. It’s hard to tell if it does any good but it seems to do something!

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  6. Asa F.

    While this air purifier is expensive, you get what you pay for. Extremely solid build with quality apparent throughout. It is controlled by a single knob and has no programmable settings, but is almost completely silent on the lowest setting and can generally be left on low and forgotten. I use it in my bedroom, and the difference in air quality between there and the rest of the house is profound. Definitely worth the price, and would purchase again without hesitation.

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  7. Puah Dickson

    Produces a rotary like sound after operating for 1 year ++ it is so loud that i had to switch it off during sleep. I bought a honey well air purifier at the same time but honey well is still going strong and silent

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  8. Anne Carter

    I’d spent much time looking for something to help with my asthma and heyfever after reviewing many other air purifiers i kept returning to the Blueair the time spent researching has paid off this does clean the air.

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  9. tinam

    Air in room more fresher and with 3 settings on this will freshen the most biggest of rooms. Can barely hear it running at night. Don’t think it’s worth the price I paid though but certainly does what it’s supposed to do.

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  10. Kyle N.

    I don’t know why, but when I first started using my purifier, I left it on max and left the room I put it in for the entire day. Coming back, my room smelled like as if I were at the sea. Considering that I’m allergic to seafood too, this is truly inconvenient.

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  11. Roy

    Very good product, setting 1-2 its very silent. Has a big filter. SmokeStop filter is not attched. Connecting to WiFi is a bit tricky.Have been using it daily, a family member had a constant cough. Using this has completely stopped the cough!! Which is quite incredible.Has no air quality indicator which is a bit inconvenient as we do not know how well its cleaning. But as a basic air filter you cant get anything better than this for your normal sized bedroom.

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  12. Amazon Customer

    This air purifier is effective. I suffer from allergic rhinitis , and this machine makes my noise breathe more freely when I am at home. However, this machine is not quiet when it is working. It has weird, sharp noise , quite like white noise. I could not bear this noise, so I am going to return this one.I gave 3 stars because I ordered this big machine for quietness and it didn’t meet my expectations.

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  13. Taylor Van Beek

    I’m on my third unit. Every unit I’ve had keeps squealing on hepa silent mode. Unbearable on quietest mode.

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  14. Mr. K. Hubbard

    We recently bought a Holdpeak 5800D PM2.5/PM10 Monitor Detector to see how bad the air pollution was in Glastonbury where we live. We have had the Blueair 203 for a couple of years. Both these gadgets corroborate each other’s effectiveness … the Blueair knocks the 2.5 and 10 particle count down to about a third within a couple of minutes of switching it on … which is seriously impressive in a room where the air quality is already good (according to the Holdpeak monitor).So seriously recommended … and buy the replacement filters on eBay from the States … a pack of 10 costs about the same as a single filter in the UK, and it’s whilst using one of the replacement filters that I did the above measurements. We find the filters last about half a year if the machine is running all day long, even on low at night …and giving them a hoover regularly is quite an eye-opener just to see how much crud the filters visibly collect.

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  15. Claude Hrycaiko

    We noticed improved air quality right away as we have a lot of dust as we are renovating our home currently. We liked that we can easily roll from one area to another throughout the house. Wifi is simple to set up.

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