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BLUEAIR Air Purifier Large Room, Air Cleaner for Dust Pet Dander Smoke Mold Pollen Bacteria Virus Allergen, Odor Removal, for Home Bedroom Living Room, Washable Pre Filter, HEPASilent, Blue 211+ Auto

4.5 out of 5 stars 7,271 ratings

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Style: Large Room
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Purchase options and add-ons

Color White
Brand Blueair
Product Dimensions 13"D x 13"W x 20"H
Floor Area 550 Square Feet
Specification Met Energy Star Certified, AHAM Certified, CARB Certified
Power Source
Corded Electric
Item Weight
3.33 Kilograms
Control Method
Touch
Filter Type
Activated Carbon

About this item

  • AUTO ADJUSTS SO YOU CAN REST EASY: One touch auto mode uses a particle sensor to monitor pollutant levels and adjusts fan to ensure optimal air quality; LED indicator displays air quality status as excellent (blue), moderate (orange) or polluted (red)
  • CLEAN AIR IN MINUTES: Blueair’s HEPASilent dual filtration delivers up to 45% faster cleaning and up to 67% less noise than traditional HEPA filtration alone; Quickly cleans 550sqft large room in about 12.5 min or up to 2640sqft XL space in 60min, on high
  • RATED BEST FOR LOWEST ANNUAL ENERGY CONSUMPTION: Quieter (23 dB) than whisper on low; ENERGY STAR rated - uses less energy (4W) than an LED lightbulb on low so it’s kind to your wallet and the planet
  • REMOVES 99.99% OF COMMON ALLERGENS: Helps reduce allergens and pollutants that trigger allergy and asthma symptoms
  • REMOVES ODOR & PARTICLES DOWN TO 0.1 MICRON: Ideal for smoke & smog during wildfire season; Removes 99.97% of airborne particles like smoke, dust, viruses and pet dander, while the carbon filter traps light household odors from smoking, pets and cooking
  • MOST AWARDED AIR PURIFIER BRAND IN THE US: Blue Pure 211 plus Auto has won Good Housekeeping – 10 Best Air Purifiers of 2021, Best Overall Air Purifier
  • INDEPENDENTLY TESTED FOR PERFORMANCE & SAFETY, ZERO OZONE: AHAM Verifide for CADR; Ozone Safety Standards Certified by CARB; Zero Ozone Verified (<5 ppb) by Intertek Sustainability Program; Trusted Education Partner of British Health Professional Academy
  • GENUINE FILTERS FOR OPTIMAL PERFORMANCE: Replace your filter every 6 months to ensure proper functionality & only use genuine Blueair filters; Shop 211 plus Auto replacement filter: B08WWS6XSG; Upgrade to SmokeBlock filter for enhanced removal: B0B453ZDZ6

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Product guides and documents

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Product Description

"Blue Pure 211+ Auto air purifier quickly cleans 550sqft large room in about 12.5 min or up to 2640sqft extra-large space in 60min, on high. Only Blueair air purifiers use HEPASilent™ technology, delivering maximum filtration with minimum noise. Combining mechanical filtration with electrostatic charging of particles produces clean air up to 45% faster with up to 67% less noise than traditional HEPA filtration alone. Delivers high performance with automated one-button control in a lightweight, compact package and includes a washable, pre-filter in Arctic Trail (Gray). It can also be customized in other Swedish-inspired pre-filter colors that are sold separately. Carbon filter traps light household odors from smoking, pets, cooking, and more. Award-winning, sleek, Swedish design compliments your aesthetic while working hard to clean your air so you can place where it will be most effective at capturing airborne particles & odors without worrying about it cramping your style. Independently evaluated for safety standards and third-party tested for performance as part of the AHAM Verifide® Program for air cleaners, this air purifier has a Clean Air Delivery Rate (CADR) of 353 for fine smoke particles, 380 for pollen particles, and 347 for dust particles.

CLEAN AIR IN A MATTER OF MINUTES: Comparing CADR performance of Blueair models vs same models with only H13 HEPA. At similar CADRs, Blueair models achieved less noise than same models with only H13 HEPA. Noise refers to the dB(A) difference in acoustic power. Tested on Blue Pure 211+ Auto, DustMagnet™ 5400i, Protect 7400 series. Performance may vary. According to AHAM, air changes per hour (ACH) is the measure of the outside air volume added to a space divided by the volume of that space over a set amount of time.

REMOVES ODOR & PARTICLES DOWN TO 0.1 MICRON: Blueair models with HEPASilent's mechanical and electrostatic filtration produced higher CADR, lower noise, and had lower energy consumption vs. the same models with only mechanical filtration (H13 filter). Tested on PM2.5 (0.1 - 2.5 μm) up to 90min; Tested on Influenza A (H1N1) with a minimum reduction rate of 99.99% in 60min.

REMOVES 99.99% OF COMMON ALLERGENS: Tested on pollen particles 5.048 - 11.14 μm on Blue Auto, DustMagnet™ and Protect.

MOST AWARDED AIR PURIFIER BRAND IN THE US: Based on survey of over 50 awards, accolades, and recommendations issued by independent consumer associations, media publications, and industry competitions from January 1, 2022, through August 16th, 2022, for products sold in the US by top 10 air purifier brands according to NPD Group Retail Tracking Service, Small Appliances, U.S. sales dollars June 2022 YTD.

BACTERIA, VIRUS & MOLD SPORE REMOVAL: Tested to reduce E.coli and Influenza A (H1N1) with minimum reduction rate of 99.9% in 60min; Tested on A.niger with minimum reduction rate of 99.9% in 60min."

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BLUEAIR Air Purifier Large Room, Air Cleaner for Dust Pet Dander Smoke Mold Pollen Bacteria Virus Allergen, Odor Removal, for Home Bedroom Living Room, Washable Pre Filter, HEPASilent, Blue 211+ Auto


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From the manufacturer

The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked.

Low noise and energy consumption

low noise

Low noise level

Cleans the air with noise levels no louder than a whisper on low (23 dB) and with less noise than a normal conversation on high (56 dB).

low energy

Low energy consuption

ENERGY STAR certified for energy efficiency (4-38 W) - certified room air purifiers are 40% more energy-efficient than standard models.

prefilters

Compare Blue family air purifiers

211+ Auto

211+

311 Auto

411 Auto

411+

411

121

Customer Reviews
4.5 out of 5 stars 7,271
4.6 out of 5 stars 13,331
4.5 out of 5 stars 7,271
4.5 out of 5 stars 9,687
4.5 out of 5 stars 2,323
4.5 out of 5 stars 11,967
4.2 out of 5 stars 649
Price
$339.99 $399.99 $227.34 $119.99
Recommended Room Size
550 ft² 540 ft² 388 ft² 190 ft² 185 ft² 161 ft² 620 ft²
CADR - Smoke
353 cfm 350 cfm 250 cfm 123 cfm 119 cfm 105 cfm 400 cfm
Auto Mode
AQI
Included Pre-Filter
Arctic Trail Dark Shadow, Diva Blue Arctic Trail Arctic Trail Dark Shadow Dark Shadow, Diva Blue Dark Shadow, Diva Blue
Metal Filter Housing
AHAM Verifide

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This Item
BLUEAIR Air Purifier Large Room, Air Cleaner for Dust Pet Dander Smoke Mold Pollen Bacteria Virus Allergen, Odor Removal, for Home Bedroom Living Room, Washable Pre Filter, HEPASilent, Blue 211+ Auto
BLUEAIR Air Purifier Large Room, Air Cleaner for Dust Pet Dander Smoke Mold Pollen Bacteria Virus Allergen, Odor Removal, for Home Bedroom Living Room, Washable Pre Filter, HEPASilent, Blue 211+ Auto
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Price$339.99-20% $255.99
List:$319.99
-16% $52.99
List:$62.99
$219.99-20% $119.99
List:$149.99
-22% $69.99
List:$89.99
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Customer Ratings
Sold By
filter type
floor area
control method
power source
particle retention size
noise level
specification met
weight

Customer reviews

4.5 out of 5 stars
7,271 global ratings

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Customers say

Customers find the air purifier very quiet, with almost no sound whatsoever, and appreciate its effectiveness at cleaning air quickly and reducing dust. They like its appearance, noting it blends well with most decor, and find it easy to set up by simply plugging it in. The functionality, durability, and value for money receive mixed reviews - while some say it's well-made and worth the price, others report it stops working completely, breaks after two years, and consider it too expensive. The smell removal feature also gets mixed feedback, with some saying it gets rid of smells while others report air stink issues.

AI-generated from the text of customer reviews

400 customers mention "Noise level"286 positive114 negative

Customers find the air purifier very quiet, with almost no sound whatsoever, and one customer mentions it blends in like white noise.

"...It is whisper quiet when the air is clean, and still fairly quiet on the next level, only getting loud but still not unbearable on the highest..." Read more

"...On a low setting 1, it produces very little noise and works well to reduce odors. At settings 2, there is a very faint fan sound...." Read more

"...We had one in our bedroom on auto mode and it was whisper quiet!!! On the higher speeds the noise is more noticeable but not that bad...." Read more

"...Boost mode is like, wind tunnel loud! Way too loud for us to watch TV in the same room if it was on. But this mode is not for everyday use...." Read more

355 customers mention "Air quality"324 positive31 negative

Customers praise the air purifier's effectiveness, noting that it works like a charm indoors and quickly clears the air.

"...hopes for the smaller unit but after a couple days of it purifying the bedroom air, I noticed a huge difference...." Read more

"...Very efficient in that regard. It also does an excellent job of reducing dust, as much less dust accumulates on my furniture now...." Read more

"...On a low setting 1, it produces very little noise and works well to reduce odors. At settings 2, there is a very faint fan sound...." Read more

"...It definitely can move alot of air and I trust the sq. ft. rating. It can probably handle larger to be honest...." Read more

109 customers mention "Looks nice"97 positive12 negative

Customers appreciate the air purifier's appearance, noting that it blends well with most decor and matches their color schemes.

"...I also like the quality of the upgraded cover. It's a bit thicker and looks nice. The set up was simple...." Read more

"...It also looks great anywhere in the room, seamlessly blending into surrounding furniture unlike other air purifiers, and isn't too big or too small..." Read more

"...It's pretty cool and futuristic...." Read more

"...throughout the day mostly silent, cleans our air well, and has a beautiful design. I am impressed by how quiet this air purifier is!..." Read more

85 customers mention "Ease of use"76 positive9 negative

Customers find the air purifier easy to use, with straightforward setup that involves simply plugging it in, and one customer noting it's particularly suitable for senior couples.

"...It's a bit thicker and looks nice. The set up was simple. It's really just plug it in and go...." Read more

"...On the lowest fan setting they are VERY quiet and pretty unnoticeable. We had one in our bedroom on auto mode and it was whisper quiet!!!..." Read more

"...in the laundry and the inner filters last a long time and are simple to change out...." Read more

"...This has been a fantastic purchase! It’s very easy to use, you can easy clean external filter and the internal can be changed easily...." Read more

465 customers mention "Functionality"312 positive153 negative

Customers have mixed experiences with the air purifier's functionality: while some report it performs well in larger spaces like 550 sq-ft apartments, others mention issues with the unit stopping working completely or the fan malfunctioning.

"...I use it to reduce odors and dust. Works well. I keep it on setting 1 & 2 only...." Read more

"...Yes, these purifiers DO make a notable difference. They are not a gimmick. On the lowest fan setting they are VERY quiet and pretty unnoticeable...." Read more

"...It tries to power up then makes a little “thunk” sound and powers down, then tries to power up. It just keeps doing that...." Read more

"...The fan blades are free to turn and they move freely and without any issues. Trying to contact for support is extremely difficult...." Read more

191 customers mention "Smell"117 positive74 negative

Customers have mixed experiences with the air purifier's effectiveness: some report it successfully eliminates odors and improves air quality, while others say it doesn't get rid of smells and doesn't work well.

"...Not a bad smell but maybe just NO smell?..." Read more

"...This size is for a bigger room but since the door is open and the area can be stinky, I prefer this...." Read more

"...It not only detected smoke but it detected odors like fried fish that we made one night, which is pretty cool So it's good to remove cooking odors..." Read more

"...We love everything about it. It works like a charm for dust, pet odors, and even pet hair...." Read more

172 customers mention "Durability"53 positive119 negative

Customers have mixed experiences with the air purifier's durability, with some finding it well-made and noting improved air quality in their offices, while others report it breaking after two years or failing within a year of use.

"...So in less than 2 years, apparently the fan motor or the fan control circuit has failed. Unacceptable in a unit that costs this much...." Read more

"...] We had this machine for about 3 years before it stopped running...." Read more

"...I also like the quality of the upgraded cover. It's a bit thicker and looks nice. The set up was simple...." Read more

"...The exterior filter design also makes the unit more fragile; filters can get smashed if the unit is bumped into or knocked over...." Read more

103 customers mention "Value for money"52 positive51 negative

Customers have mixed opinions about the air purifier's value for money, with some finding it a good unit for the price and noting that the filter costs are reasonable, while others consider it an expensive product that doesn't last long.

"...Worth every penny." Read more

"...something negative, I guess I would have to say their OEM filter replacements are pricey but this was not a deterrent for me...." Read more

"...It is audible at higher speeds but I rarely use them. Worth the money." Read more

"...It's not super strong but noticeable. It's also pretty expensive. I'm sure there are other cheaper and maybe better options...." Read more

This purifier is amazing! Allergies, be gone!
5 out of 5 stars
This purifier is amazing! Allergies, be gone!
This is now our 2nd Blue air purifier. I originally bought the smaller Blue 411+ for our bedroom and I was very impressed with how having that in our bedroom improved my lifelong allergies that I take a daily pill for. Prior to getting the smaller 411+ I would very often wake up with a stuffed nose. Yes, we do have 2 dogs but they are not allowed in the bedroom due to my allergies. I honestly didn't have high hopes for the smaller unit but after a couple days of it purifying the bedroom air, I noticed a huge difference. I began waking up with clear sinuses and the room smelled "different". Not a bad smell but maybe just NO smell? Anyhow, after giving the little Blue a good 30 days to prove itself, I knew I needed a larger one for our living room. This is also where our dogs (golden retriever and black lab) spend most of their time with us when they are inside. And having these 2 dogs and allergies doesn't make life super easy as cleaning goes. I have to vacuum daily or every other day (minimum) and will at times pull up what looks like a small dog inside my vacuum canister. Especially, when my golden is blowing her coat.Finally after comparing, I went ahead and ordered the Blue 311 Auto for our living room which is approximately 420sf.I also bought a separate filter cover that's shown in my pictures and an additional filter to have on hand.The unit arrived well packaged and without damage.It came with a main filter installed and a a light gray filter cover but tbh, I will use the light gray cover while cleaning and drying the dark gray cover I have on it now. I as I prefer the dark (name is actually Winter Reed) over the lighter gray. I also like the quality of the upgraded cover. It's a bit thicker and looks nice.The set up was simple. It's really just plug it in and go.I like that this unit has 4 mode settings and indicator lights to show air quality and when the filter needs replaced.I have noticed one time when out of nowhere the air quality sensor light briefly turned from blue to orange then back to blue.The light sensor color indicators and level info are Blue (good), Orange (moderate), and Red (polluted).The main filter change sensor is supposed to switch on after 6 months of use but I haven't had it long enough to confirm if that works yet.For maintenance, I do run my vacuum brush over the outer filter cover once a week to clean any dust off of it which, there always is. This was also an immediate indicator to me that this fella is doing its job!I will also run a damp cloth on the the plastic exterior at the same time just to keep it clean and in the best working condition.Noise Level:This 311 Auto unit has 4 modes.✔Auto Mode: (fan speed will change depending on the air quality it senses).✔Night Mode: (whisper quiet, low speed)✔Everyday Mode: (medium speed)✔Boost Mode: (fastest speed and very loud).Boost mode is like, wind tunnel loud! Way too loud for us to watch TV in the same room if it was on. But this mode is not for everyday use. The only time I've used boost mode is when there is a specific reason i.e.,dogs came in from rain or I may have cooked/baked something that has a lingering smell, etc. I would just turn it on boost for 10 minutes or so to dissipate whatever the odor issue may be.We typically have it set on auto mode or everyday mode and it's very, very quiet. I would say auto mode is more quiet or no louder than an average fan that's on it's lowest speed and everyday mode is maybe as loud as a fan on medium setting.▪️Please see video I took of the different modes to show the sound difference between all four settings▪️I have now had this particular unit running 24/7 for about 2 months and we love it! We live in Washington State so when it rains and our fur babies go out for break, any "wet dog" smell is gone in minutes if I kick in the boost mode but everyday mode will also take care of that within an hour or so.Sadly, I also know fire season will soon be upon us for summer and I have no doubt both units will do a fantastic job at keeping the quality of air inside our home filtered, clean and smelling fresh during the seasonal bad air quality.We will be tackling a full home remodel next year which we'll be adding central heating and air but even then, I plan on keeping both these units up and running!Would I recommend this Blueair 311 Auto?Absolutely 100%.Summary: All in all, if you suffer from allergies/asthma like me, have animals, or simply a home without filtered air and are teetering on whether or not to purchase, go for it! You won't regret it! Personally, these air purifiers have honestly changed my life! I wish I would've found this company sooner! I HIGHLY recommend!If I must find something negative, I guess I would have to say their OEM filter replacements are pricey but this was not a deterrent for me. They also offer an auto ship filter service for a discount.I give this an easy 5 star!(I was NOT paid for this review and was not asked to leave one. I have no affiliation with this company other than being a new-ish forever customer)!Hopefully this will help someone!
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Top reviews from the United States

  • Reviewed in the United States on June 30, 2021
    Style: Medium RoomVerified Purchase
    The media could not be loaded.
    This is now our 2nd Blue air purifier. I originally bought the smaller Blue 411+ for our bedroom and I was very impressed with how having that in our bedroom improved my lifelong allergies that I take a daily pill for. Prior to getting the smaller 411+ I would very often wake up with a stuffed nose. Yes, we do have 2 dogs but they are not allowed in the bedroom due to my allergies. I honestly didn't have high hopes for the smaller unit but after a couple days of it purifying the bedroom air, I noticed a huge difference. I began waking up with clear sinuses and the room smelled "different". Not a bad smell but maybe just NO smell? Anyhow, after giving the little Blue a good 30 days to prove itself, I knew I needed a larger one for our living room. This is also where our dogs (golden retriever and black lab) spend most of their time with us when they are inside. And having these 2 dogs and allergies doesn't make life super easy as cleaning goes. I have to vacuum daily or every other day (minimum) and will at times pull up what looks like a small dog inside my vacuum canister. Especially, when my golden is blowing her coat.
    Finally after comparing, I went ahead and ordered the Blue 311 Auto for our living room which is approximately 420sf.
    I also bought a separate filter cover that's shown in my pictures and an additional filter to have on hand.

    The unit arrived well packaged and without damage.
    It came with a main filter installed and a a light gray filter cover but tbh, I will use the light gray cover while cleaning and drying the dark gray cover I have on it now. I as I prefer the dark (name is actually Winter Reed) over the lighter gray. I also like the quality of the upgraded cover. It's a bit thicker and looks nice.
    The set up was simple. It's really just plug it in and go.

    I like that this unit has 4 mode settings and indicator lights to show air quality and when the filter needs replaced.
    I have noticed one time when out of nowhere the air quality sensor light briefly turned from blue to orange then back to blue.

    The light sensor color indicators and level info are Blue (good), Orange (moderate), and Red (polluted).

    The main filter change sensor is supposed to switch on after 6 months of use but I haven't had it long enough to confirm if that works yet.

    For maintenance, I do run my vacuum brush over the outer filter cover once a week to clean any dust off of it which, there always is. This was also an immediate indicator to me that this fella is doing its job!
    I will also run a damp cloth on the the plastic exterior at the same time just to keep it clean and in the best working condition.

    Noise Level:
    This 311 Auto unit has 4 modes.
    ✔Auto Mode: (fan speed will change depending on the air quality it senses).
    ✔Night Mode: (whisper quiet, low speed)
    ✔Everyday Mode: (medium speed)
    ✔Boost Mode: (fastest speed and very loud).
    Boost mode is like, wind tunnel loud! Way too loud for us to watch TV in the same room if it was on. But this mode is not for everyday use. The only time I've used boost mode is when there is a specific reason i.e.,dogs came in from rain or I may have cooked/baked something that has a lingering smell, etc. I would just turn it on boost for 10 minutes or so to dissipate whatever the odor issue may be.

    We typically have it set on auto mode or everyday mode and it's very, very quiet. I would say auto mode is more quiet or no louder than an average fan that's on it's lowest speed and everyday mode is maybe as loud as a fan on medium setting.
    ▪️Please see video I took of the different modes to show the sound difference between all four settings▪️

    I have now had this particular unit running 24/7 for about 2 months and we love it! We live in Washington State so when it rains and our fur babies go out for break, any "wet dog" smell is gone in minutes if I kick in the boost mode but everyday mode will also take care of that within an hour or so.
    Sadly, I also know fire season will soon be upon us for summer and I have no doubt both units will do a fantastic job at keeping the quality of air inside our home filtered, clean and smelling fresh during the seasonal bad air quality.
    We will be tackling a full home remodel next year which we'll be adding central heating and air but even then, I plan on keeping both these units up and running!

    Would I recommend this Blueair 311 Auto?
    Absolutely 100%.

    Summary: All in all, if you suffer from allergies/asthma like me, have animals, or simply a home without filtered air and are teetering on whether or not to purchase, go for it! You won't regret it! Personally, these air purifiers have honestly changed my life! I wish I would've found this company sooner! I HIGHLY recommend!
    If I must find something negative, I guess I would have to say their OEM filter replacements are pricey but this was not a deterrent for me. They also offer an auto ship filter service for a discount.
    I give this an easy 5 star!

    (I was NOT paid for this review and was not asked to leave one. I have no affiliation with this company other than being a new-ish forever customer)!

    Hopefully this will help someone!
    Customer image
    5.0 out of 5 stars
    This purifier is amazing! Allergies, be gone!

    Reviewed in the United States on June 30, 2021
    This is now our 2nd Blue air purifier. I originally bought the smaller Blue 411+ for our bedroom and I was very impressed with how having that in our bedroom improved my lifelong allergies that I take a daily pill for. Prior to getting the smaller 411+ I would very often wake up with a stuffed nose. Yes, we do have 2 dogs but they are not allowed in the bedroom due to my allergies. I honestly didn't have high hopes for the smaller unit but after a couple days of it purifying the bedroom air, I noticed a huge difference. I began waking up with clear sinuses and the room smelled "different". Not a bad smell but maybe just NO smell? Anyhow, after giving the little Blue a good 30 days to prove itself, I knew I needed a larger one for our living room. This is also where our dogs (golden retriever and black lab) spend most of their time with us when they are inside. And having these 2 dogs and allergies doesn't make life super easy as cleaning goes. I have to vacuum daily or every other day (minimum) and will at times pull up what looks like a small dog inside my vacuum canister. Especially, when my golden is blowing her coat.
    Finally after comparing, I went ahead and ordered the Blue 311 Auto for our living room which is approximately 420sf.
    I also bought a separate filter cover that's shown in my pictures and an additional filter to have on hand.

    The unit arrived well packaged and without damage.
    It came with a main filter installed and a a light gray filter cover but tbh, I will use the light gray cover while cleaning and drying the dark gray cover I have on it now. I as I prefer the dark (name is actually Winter Reed) over the lighter gray. I also like the quality of the upgraded cover. It's a bit thicker and looks nice.
    The set up was simple. It's really just plug it in and go.

    I like that this unit has 4 mode settings and indicator lights to show air quality and when the filter needs replaced.
    I have noticed one time when out of nowhere the air quality sensor light briefly turned from blue to orange then back to blue.

    The light sensor color indicators and level info are Blue (good), Orange (moderate), and Red (polluted).

    The main filter change sensor is supposed to switch on after 6 months of use but I haven't had it long enough to confirm if that works yet.

    For maintenance, I do run my vacuum brush over the outer filter cover once a week to clean any dust off of it which, there always is. This was also an immediate indicator to me that this fella is doing its job!
    I will also run a damp cloth on the the plastic exterior at the same time just to keep it clean and in the best working condition.

    Noise Level:
    This 311 Auto unit has 4 modes.
    ✔Auto Mode: (fan speed will change depending on the air quality it senses).
    ✔Night Mode: (whisper quiet, low speed)
    ✔Everyday Mode: (medium speed)
    ✔Boost Mode: (fastest speed and very loud).
    Boost mode is like, wind tunnel loud! Way too loud for us to watch TV in the same room if it was on. But this mode is not for everyday use. The only time I've used boost mode is when there is a specific reason i.e.,dogs came in from rain or I may have cooked/baked something that has a lingering smell, etc. I would just turn it on boost for 10 minutes or so to dissipate whatever the odor issue may be.

    We typically have it set on auto mode or everyday mode and it's very, very quiet. I would say auto mode is more quiet or no louder than an average fan that's on it's lowest speed and everyday mode is maybe as loud as a fan on medium setting.
    ▪️Please see video I took of the different modes to show the sound difference between all four settings▪️

    I have now had this particular unit running 24/7 for about 2 months and we love it! We live in Washington State so when it rains and our fur babies go out for break, any "wet dog" smell is gone in minutes if I kick in the boost mode but everyday mode will also take care of that within an hour or so.
    Sadly, I also know fire season will soon be upon us for summer and I have no doubt both units will do a fantastic job at keeping the quality of air inside our home filtered, clean and smelling fresh during the seasonal bad air quality.
    We will be tackling a full home remodel next year which we'll be adding central heating and air but even then, I plan on keeping both these units up and running!

    Would I recommend this Blueair 311 Auto?
    Absolutely 100%.

    Summary: All in all, if you suffer from allergies/asthma like me, have animals, or simply a home without filtered air and are teetering on whether or not to purchase, go for it! You won't regret it! Personally, these air purifiers have honestly changed my life! I wish I would've found this company sooner! I HIGHLY recommend!
    If I must find something negative, I guess I would have to say their OEM filter replacements are pricey but this was not a deterrent for me. They also offer an auto ship filter service for a discount.
    I give this an easy 5 star!

    (I was NOT paid for this review and was not asked to leave one. I have no affiliation with this company other than being a new-ish forever customer)!

    Hopefully this will help someone!
    Images in this review
    Customer imageCustomer imageCustomer image
    710 people found this helpful
    Report
  • Reviewed in the United States on May 1, 2024
    Style: Small RoomVerified Purchase
    This is the second BlueAir air purifier I've purchased, and I absolutely love them. I use this one in my living/dining room, and I have it normally set on auto. It is whisper quiet when the air is clean, and still fairly quiet on the next level, only getting loud but still not unbearable on the highest setting when it is cleaning the air.

    I have a small kitchen so anytime we cook anything the smell inevitably fills the dining and living room. This air purifier then immediately kicks into high gear and within an hour cleans the air. Very efficient in that regard.

    It also does an excellent job of reducing dust, as much less dust accumulates on my furniture now. While I can say for a fact if that will help with allergy relief since fortunately I don't suffer from it, I assume less dust helps.

    While the air purifier is very light weight, it still feels very durable. It also looks great anywhere in the room, seamlessly blending into surrounding furniture unlike other air purifiers, and isn't too big or too small so can really fit anywhere.

    I'll definitely be purchasing more purifiers from this company for other rooms.
    Customer image
    5.0 out of 5 stars
    Form and function!

    Reviewed in the United States on May 1, 2024
    This is the second BlueAir air purifier I've purchased, and I absolutely love them. I use this one in my living/dining room, and I have it normally set on auto. It is whisper quiet when the air is clean, and still fairly quiet on the next level, only getting loud but still not unbearable on the highest setting when it is cleaning the air.

    I have a small kitchen so anytime we cook anything the smell inevitably fills the dining and living room. This air purifier then immediately kicks into high gear and within an hour cleans the air. Very efficient in that regard.

    It also does an excellent job of reducing dust, as much less dust accumulates on my furniture now. While I can say for a fact if that will help with allergy relief since fortunately I don't suffer from it, I assume less dust helps.

    While the air purifier is very light weight, it still feels very durable. It also looks great anywhere in the room, seamlessly blending into surrounding furniture unlike other air purifiers, and isn't too big or too small so can really fit anywhere.

    I'll definitely be purchasing more purifiers from this company for other rooms.
    Images in this review
    Customer imageCustomer imageCustomer image
    8 people found this helpful
    Report
  • Reviewed in the United States on May 14, 2024
    Style: Small RoomVerified Purchase
    The media could not be loaded.
    I use this in a small room with an open door, approx 5x5ft with 2 litterboxes. I use it to reduce odors and dust. Works well. I keep it on setting 1 & 2 only.

    This size is for a bigger room but since the door is open and the area can be stinky, I prefer this.

    On a low setting 1, it produces very little noise and works well to reduce odors. At settings 2, there is a very faint fan sound.
    Setting 3 has noticeable noise.
    There's a setting for sleep, letting it quiet down but but have not used

    I've had this running for several months with no issues. The light on top turns orange and red when time to change filters.
    6 people found this helpful
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  • Reviewed in the United States on January 2, 2022
    Style: Large RoomVerified Purchase
    I'm in California and this past summer was bad in terms of wildfires and it's impact on our air quality. It's the first time where the smoke affected us INSIDE our house. It was so bad where we were that it was a thick fog of smoke at ground level for a week. We're working from home with kids and a dog. And there were days when we could see the smoke inside the house, meaning we could see haze inside. My wife was coughing and sneezing. I ended up buying two of these units, one for each floor of our house during the day and used one in our bedroom during the night. The auto mode feature is pretty cool and the sensor is pretty sensitive. Basically, it autodetects the air quality and adjust the fan speed accordingly. It not only detected smoke but it detected odors like fried fish that we made one night, which is pretty cool So it's good to remove cooking odors as well. I did test it out on a smoky day and it did detect poor air quality and upped the fan. Within 30 minutes it cleared out the air. Yes, these purifiers DO make a notable difference. They are not a gimmick. On the lowest fan setting they are VERY quiet and pretty unnoticeable. We had one in our bedroom on auto mode and it was whisper quiet!!! On the higher speeds the noise is more noticeable but not that bad. It definitely can move alot of air and I trust the sq. ft. rating. It can probably handle larger to be honest. Lastly, I like the nice touch sensitive touch pad with indicator lights to adjust fan speed and turn the unit on. It's pretty cool and futuristic.

    The CON... as with many reviewers, I can confirm there is a weird chemical like odor from the purifier itself. I think it's from the filter. After awhile you don't notice it but it is there. It's not super strong but noticeable. It's also pretty expensive. I'm sure there are other cheaper and maybe better options. I bought these in a rush as availability of other purifiers at the time was very little. We are happy with them overall and will likely continue to use them. They are a nice small form factor and fit well with our decor.
    15 people found this helpful
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  • Jose Luis Salinas
    1.0 out of 5 stars HEPAsilent no es HEPA dan información confusa
    Reviewed in Mexico on March 20, 2025
    Style: Large RoomVerified Purchase
    En Monterrey donde radico estamos teniendo problemas con el aire y aunque llevo 3 años con el producto y funciona bien he investigado la marca y dan información confusa sobre el producto. Tiene un filtro HEPAsilent que no es un filtro HEPA real. La marca engaña con esa información porque hacen creer que si es HEPA real. Solo por eso estoy decepcionado de la marca!
    Customer image
    Jose Luis Salinas
    1.0 out of 5 stars
    HEPAsilent no es HEPA dan información confusa

    Reviewed in Mexico on March 20, 2025
    En Monterrey donde radico estamos teniendo problemas con el aire y aunque llevo 3 años con el producto y funciona bien he investigado la marca y dan información confusa sobre el producto. Tiene un filtro HEPAsilent que no es un filtro HEPA real. La marca engaña con esa información porque hacen creer que si es HEPA real. Solo por eso estoy decepcionado de la marca!
    Images in this review
    Customer image
    Report
  • Kat Meerkat
    5.0 out of 5 stars Cleans up the air really fast
    Reviewed in Canada on May 15, 2024
    Style: Small RoomVerified Purchase
    I bought it last year when the walls in my apartment building were painted with some stinky paint, and I started feeling nauseous and had a headache because of that toxic smell. This purifier helps to deal with such things and it does it quickly. It cleans up the air when I cook, it saves from the city smog and the consequences of forest fires. This one is not big, but it sucks the air in from all sides, so it's way more effective than rectangular filters, even if they cost more (I have something to compare it with). The filter is easy to clean, it's not noisy, and the light shows it's sensitivity as it reacts to the changes in the air very fast (if I use a hair spray, it goes red almost immediately, even if I'm 5 meters away from it).
    Customer image
    Kat Meerkat
    5.0 out of 5 stars
    Cleans up the air really fast

    Reviewed in Canada on May 15, 2024
    I bought it last year when the walls in my apartment building were painted with some stinky paint, and I started feeling nauseous and had a headache because of that toxic smell. This purifier helps to deal with such things and it does it quickly. It cleans up the air when I cook, it saves from the city smog and the consequences of forest fires. This one is not big, but it sucks the air in from all sides, so it's way more effective than rectangular filters, even if they cost more (I have something to compare it with). The filter is easy to clean, it's not noisy, and the light shows it's sensitivity as it reacts to the changes in the air very fast (if I use a hair spray, it goes red almost immediately, even if I'm 5 meters away from it).
    Images in this review
    Customer image
  • George in Canada
    5.0 out of 5 stars Efficient purifier, good appearance, easy filter replacement, cumbersome controls.
    Reviewed in Canada on August 26, 2023
    Style: Large RoomVerified Purchase
    This air purifier improved air quality discernably in our 2-bedroom condo during the recent choking wildfire smoke. Glad we bought it. Very quiet in night mode and acceptable during higher settings. The HEPA filters can be replaced easily however they are still okay after about 100 hours of use in the medium speed setting and with closed windows. The touch controls are neatly integrated and unobtrusive however we would prefer simpler ergonomic buttons or nobs located on the side because it is not easy to find the right setting without numerals or idiot dots. Please redesign the controls to earn 5 stars.
  • César Muñoz
    5.0 out of 5 stars Revisión de producto
    Reviewed in Mexico on March 26, 2024
    Style: Small RoomVerified Purchase
    Excelente producto, superó mis expectativas.
  • Luis Miguel Covarrubias Méndez
    3.0 out of 5 stars Tengo 2, creo tener mi favorito…
    Reviewed in Mexico on July 2, 2022
    Style: Medium RoomVerified Purchase
    Tengo 2 purificadores, un dyson y este, el primero tiene control remoto y una pantallita que muestra el funcionamiento tiempo real y coincide con “lo qué pasa” en el consultorio; me recomendaron mucho este otro y en su modalidad automática hace lo que quiere, estas quemando algo y el humo pasa literal frente al aparato y no se enciende 😐…