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Model #311PACF105529

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Blue Pure 311 Auto HEPASilent Air Purifier, 388 sq. ft. - Gray

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Product Overview

The Blue Pure 311 Auto air purifier takes a simple approach to air quality management with an integrated particle sensor, Auto mode setting, and LED air quality display. Independently evaluated for performance by the AHAM Verifide Program for a Clean Air Delivery Rate of 250 for fine smoke particles, 250 for pollen particles, and 244 for dust particles. Best for medium rooms like a master bedroom, living room, or playroom with a 360° air intake to filter room air about every 12 minutes (about 5x an hour at 388 sq.ft) on high. The 3-step filter works with HEPASilent filtration technology to remove 99.97% of airborne particles down to 0.1 microns, like pollen, dust, pet dander, mold, bacteria, viruses°, and more, while a layer of activated coconut carbon traps light household odors. Features a 3-color LED air quality display and one-touch enabled Auto mode setting to auto-adjust to real-time conditions. Noise levels equivalent to a whisper on low (30-52 dB), and ENERGY STAR rated energy efficiency (7-35 W). Change color with five fabric pre-filters inspired by Scandinavian nature. Pre-filter in Arctic Trail (gray) included; Additional colors sold separately. All Blueair purifiers are AHAM Verifide for Clean Air Delivery Rate and recommended room size, ENERGY STAR rated, and tested by the California EPA Air Resources Board (CARB) for safe ozone emissions.This air purifier has not been tested against Coronavirus, and Blueair does not claim to capture, remove, or kill 2019-nCoV.
  • Performance you can trust; independently evaluated and third-party tested for performance as part of the AHAM Verified program for room air cleaners
  • Recommended for medium rooms; completely filters air in master bedroom, living room or playroom about every 12 mins (approx. 5x an hour at 388 sq. ft. ) on high
  • Intuitive auto mode; automatically adjusts to real-time conditions reported by the particle sensor to maintain a comfortable home environment
  • Combination filter; carbon traps light odors; HEPASilent technology removes 99.97% of airborne particles down to 0.1 micron, like pollen, dust, and viruses
  • Low noise and energy; cleans the air with noise levels equivalent to a soft whisper on low (30-52 dB) and ENERGY STAR rated energy efficiency (7-35-Watt)
  • Customize freely; washable fabric pre-filter in arctic trail (gray) included; additional pre-filter colors inspired by scandinavian nature sold separately

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Name5500-2 Air Cleaner with PlasmaWave TechnologyBlue Pure 311 Auto HEPASilent Air Purifier, 388 sq. ft. - GrayBlue Pure 211+ Air Purifier with Allergen and Odor Remover, Washable Pre-FilterBlue Pure 121 Air Purifier with Allergen and Odor Remover, Washable Pre-Filter
Maximum coverage area (sq. ft.)360412540620
Air Purifier TypeConsolePersonalConsoleConsole
Primary Filter TypeHEPA - TrueHEPA - TypeHEPA - TypeHEPA - Type
CADR (Clean Air Delivery Rate)23299.7350400
Package SizeIndividualIndividualIndividualIndividual
View ProductView ProductView ProductView Product



Maximum coverage area (sq. ft.)
Product Depth (in.)
10.2 in
Product Height (in.)
20.47 in
Product Width (in.)
10.2 in


Air Purifier Features
Humidifier Included
Air Purifier Type
Air Treatment Product Type
Air Purifier
Appliance Category
Air Purifiers
Automatic shutoff
CADR (Clean Air Delivery Rate)
Gray, White
Color Family
Control Type
Effectiveness (%)
Filter/bulb monitor
Filtered or Filterless
HEPA Filter
Number of Air Filters Included
Number of Air Purifers (Per Pack)
Number of cleaning stages
Number of Fan Speeds
Pack Size
Package Size
Primary Filter Type
HEPA - Type
Product Weight (lb.)
6.8 lb
Remote Control
Removes bacteria
Removes dust
Removes mold
Removes odors
Removes particulates
Removes pollen
Removes viruses
UVC lamp
Voltage (volts)
Wall Mountable

Warranty / Certifications

Certifications and Listings
CARB Compliant
Manufacturer Warranty
1 Year Limited-Warranty

Questions & Answers


where is the air intake and outtake ? on this machine the 311

Asked by rhonda April 18, 2021

The air intake of the Blue PURE 311 is all around the body of the air purifier- the portion covered by the cloth pre-filter. The air outtake is on the top of the air purifier where you can see the dotted spaces and feel the airflow.

Country of origin?

Asked by carp April 7, 2021

Blueair is a Swedish company. Our air purifiers are designed in Sweden and Manufactured in China.

Does it has washable prefilter?

Asked by Carmen March 21, 2021

Thank you for your interest. This unit comes with a washable cloth prefilter and a particle plus carbon filter that is not washable and we recommend replacing every 6 months.

Are there other compatable filters

Asked by Barb January 16, 2021

Satisfied with this product, a good purchase for me I will buy again !

Customer Reviews

  • 4.9
    out of 108 reviews
  • 98% recommend this product
Filter by:
Showing 1-10 of 108 reviews
Almost Perfect
I bought this to clean the air and dust particles in the air in my barn house. I can tell a difference because I’m not sneezing, blowing my nose or taking Zertec as often! The only complaint I have is that it draws dirt to the outside as well as the inside and that makes it look less efficient.
by Mississippi Nana
Incredible Air Purifier
I bought 2 of the Blueair 311 Auto Air Purifier for my office and bedroom. My wife has allergies and this purifier has been incredible in helping her stop sneezing in the morning. I cannot recommend it enough. Super quiet also.
The device is lightweight quiet and appears to be working...
The device is lightweight quiet and appears to be working well. Burning food on the stove that creates a small amount of smell in the air triggers high speed filtration.I don’t know yet how it will work on smoke during the wildfire season but I already plan to buy a second one for the back of my house
by HomeDepotCustomer
Great features and convenient to use!
I bought this a month ago and I am glad that I did. Every time I burn an incense, the filter even in other room turns red so it seems very sensitive to dust, smoke etc. It probably also filters pollen as described (that I am allergic to), however if the windows are open and allergens are high, the filter does not turn yellow or red so not sure if it is very sensitive to pollen unless the air outside has smoke or has low air quality. The air feels fresh and clean though so definitely worth a buy!
by Priya
Worked great while it worked
I bought in October 2020. Worked great as of last filter change (June 2021) I change every 2 months because we smoke. Now fan isn’t running.
by Wendy01
The air feels so much better.
I was introduced to Blueair during a visit to Denver. The Airbnb I stayed in had a Blueair purifier and I thought it did a great job keeping the air clean. When I got home I bought one for my room and absolutely love it. My head feels way more clear than before I owned the purifier. I plan on buying another one for my living room.
by Winston
Worked so well I got a second one
I bought this Blueair purifier because a family member with severe animal allergies was coming to visit for 2 weeks and we have 7 cats & dogs. We also live in the desert and have considerable dust that sneaks into the house. I am happy to report that dander allergies were kept to a minimum and the dust on countertops and other surfaces was dramatically reduced. I ordered a second one a few days after receiving the first. these purifiers have made an incredible difference in our indoor air quality!
by EthelPatricia
Black Wall Effect
Haven’t had the smell issue people talk about. After a few months of use I started to notice the area around the purifier turning black (white walls, molding and window treatments). Now after a few months my entire room - walls, doors and window frames - are caked in soot. Going to need to get a deep cleaning. Not sure I want to continue using it if this is the downside.
by Maxwell
Wow! Allergies, cats, and MMJ
So, my wife and I have really bad allergies, and 3 cats, and MMJ patient. I can't believe how wonderfully this thing works. I kicked it on right out of the box. And yes. I did check for the tiktok plastic bag thing, it's not there. No need to check! I ran it on auto for the first 2 hrs and got a blue light and it's very quiet. We wouldn't known it was working right til I needed to smoke. The light turned red and not 1 mins into smoking the 311 went red turned on full blast and poof its clean air.
by Tom S
A Quiet and Efficient Air Purifier
After looking a number of purifiers, I eventually relied on Consumer Reports for guidance and settled on the PURE 311 Auto. We have the 311 in our master bedroom. The unit is quiet at low and although a bit loud on high, we run it in auto and it has never run the speed up. We have experienced a significant improvement in breathing and nasal stuffiness since placing the 311 in our room. It just keeps the air clean!
by BKS70
Showing 1-10 of 108 reviews