Questions & Answers

Q: QuestionWhat is the Clean Air Delivery Rate for this air purifier?

• A:Answer The Clean Air Delivery Rate is 250 cubic feet per minute.

Q: QuestionIs this air purifier compatible with any application?

• A:Answer Yes, this air purifier is compatible with an application.

Q: QuestionDoes this air purifier have a timer that can be programmed?

• A:Answer Yes, this air purifier has a programmable timer.

Q: QuestionDoes this air purifier remove dust and pollen?

• A:Answer Yes, this air purifier captures pollen and dust.

Q: QuestionCan this air purifier be controlled using voice commands?

• A:Answer Yes, voice control is available for this air purifier.

Q: QuestionDoes this air purifier have an indicator for the filter?

• A:Answer Yes, this air purifier has filter indicator lights.

Q: Questionwhat is the difference between the 311i Max and the 311i + Max?

Asked 2 years ago by confused.

• A:Answer The Blue Pure 311i+ Max air purifier cleans up to 1,116sqft large space in 30min on high and has a Clean Air Delivery Rate (CADR) of 300 for fine smoke particles, dust and pollen. The Blue Pure 311i Max air purifier cleans up to 929sqft space in 30min on high. This air purifier has a Clean Air Delivery Rate (CADR) of 250 for fine smoke particles, dust and pollen.

  Answered 2 years ago by Anonymous

  Helpful (14)Unhelpful (0)ReportAnswer this questionShow more answers (1)

Q: QuestionIf this Blueair purifier is set in automatic, it stays on at all times. Should it be turned off at intervals, or is it ok to keep it running at all times 24/7? Thank you.

Asked 11 months ago by RamonS.

• A:Answer Thank you for your interest in Blueair! Yes, your Blue Pure 311i Max air purifier can operate 24/7, and in fact, continuous use is recommended — especially when set to Auto mode, which automatically adjusts the fan speed based on real-time air quality. This helps maintain optimal indoor conditions.

  Answered 10 months ago by Blueair Support Team

  
  Helpful (2)Unhelpful (0)ReportAnswer this questionShow more answers (2)

Q: QuestionCan anybody say if Blueair air purifiers have True HEPA filters? It says HEPASilent but is it the same thing? Their replacement filters do not seem to mention HEPA at all in the description. My Levoit units were stripped of HEPA labeling.

Asked 1 year ago by DL.

• A:Answer Thank you for your interest in Blueair! Our air purifiers feature unique HEPASilent™ technology, which combines traditional mechanical filtration with electrostatic charging to clean the air faster, produce more clean air, and do so much more quietly than conventional HEPA purifiers. This innovative technology, ensures maximum filtration with minimal noise, delivering clean, filtered air to your room as quickly as possible.

  Answered 1 year ago by Blueair Support Team

  
  Helpful (4)Unhelpful (2)ReportAnswer this questionShow more answers (1)

Q: QuestionHow good is this unit for removing dust and rate of air circulation

Asked 2 years ago by Bb.

• A:Answer I have one cat, hardwood floors and two flat-weave wool carpets, a central HVAC system that is regularly serviced AND I vacuum and dust *everything* at least weekly. If I don't, there's a visible layer of dust on everything (this was true even before I adopted a cat). So: I purchased this unit three weeks ago in the hopes that it would reduce the dust so that I could go longer in between flat-out cleaning sprees-- and also so that my cat's allergies might improve. (Yeah, you read that right: my cat is pretty severely allergic to dust mites and I figured this air purifier is less expensive than a very unhappy cat and repeated vet visits.) So how's it going? The good: rate of air circulation is amazing, truly, especially on setting #2 or 3--and my place feels *fresher* when running it on those settings, if that makes sense. Running it at setting 3 while cooking is also *helpful* in keeping the place smelling fresh, but don't expect miracles-- maybe 50% better? Also: running it 24/7 on setting 2 or 3 isn't practical--it's both loud and windy. I generally leave it on Auto. The bad: my place is still seriously dusty. With the same amount of cat hair forming the same tumbleweeds. Honestly, I didn't notice much improvement on dust or hair, which was v disappointing. Lastly: my cat might be itching less? hard to tell if it's helping but it's not hurting. *My* allergies (pet dander, dust mites) seem to be exactly the same as before (I need benadryl ~2x week, so they aren't severe, ymmv). Do I regret my purchase? No. Do I wish this machine would improve the dust situation: yes.

  Answered 2 years ago by Anonymous

  Helpful (2)Unhelpful (0)ReportAnswer this questionShow more answers (2)

Q: QuestionMy house is 2 floors with a total of 1350 sq. ft. If I get one of these, better to put it on the 1st. or 2nd floor?

Asked 8 months ago by Ed.

• A:Answer Thank you for your interest in Blueair! The Blue Pure 311i Max quickly cleans 439 sq. ft. in 12.5 minutes and 1,054 sq. ft. in 30 minutes. We recommend placing it on the floor where you spend the most time. For best results, consider having an air purifier on each floor to maintain consistent air quality throughout your home.

  Answered 7 months ago by Blueair Support Team

  
  Helpful (1)Unhelpful (0)ReportAnswer this questionShow more answers (1)

Q: QuestionDoes this air purifier help with urine odor?

Asked 3 weeks ago by DeeDee.

• A:Answer Thank you for your interest in Blueair! Our Blue Pure 311i Max air purifier is designed to clean the air in a 439 ft² space in about 12.5 minutes or up to 1,054 ft² in 30 minutes to effectively lower particle levels, including pet odors and VOCs. We recommend placing the purifier in an area within the recommended square footage to ensure optimal performance. We hope this information is helpful!

  Answered 2 weeks ago by Blueair Support Team

  
  Helpful (0)Unhelpful (0)ReportAnswer this question

Q: QuestionDoes this have a HEPA filter

Asked 2 months ago by Kathy.

• A:Answer Yes, it does have a hepa filter and what I like about the air purifier is that it has an outer pre filter which can be machine or hand washed allowing your hepa filter to last a little longer.

  Answered 2 months ago by AileenNVerified Purchase

  Helpful (0)Unhelpful (0)ReportAnswer this questionShow more answers (1)

Q: QuestionDo you have to use the app?

Asked 3 months ago by Maria.

• A:Answer Thank you for your question! You do not need to use the Blueair app to operate the Blue Pure 311i Max. The air purifier has a simple, two-button control panel on the unit itself. You can use the On/Standby button to power the purifier on or off, and use the Fan Speed button to switch between modes and adjust the airflow. The purifier offers four fan speeds—with Night Mode being the quietest setting and Speed 3 being the highest.

  Answered 3 months ago by Blueair Support Team

  
  Helpful (0)Unhelpful (0)ReportAnswer this questionShow more answers (1)

Q: QuestionWhat is the dwcible range?

Asked 4 months ago by Ed.

• A:Answer Thank you for your interest in Blueair! Our Blue Pure 311i Max air purifier is Quiet Mark certified, delivering clean air with minimal noise at just 23–50 dB, all while capturing 99.97% of airborne particles. I hope this information is helpful! For more product details, please visit our website: https://www.blueair.com/products/blue-pure-311i-max

  Answered 4 months ago by Blueair Support Team

  
  Helpful (0)Unhelpful (0)ReportAnswer this question

Q: QuestionThis device keeps turning itself off after a couple of hours. This is a brand new device. I don't think this is normal, especially since I have other air purifier brands that I have kept on for months on end. What is the solution to this?

Asked 5 months ago by JohnBeam.

• A:Answer My air purifier does not automatically turn itself off. The only time it turns itself off is if I manually turn it off.

  Answered 2 months ago by AileenNVerified Purchase

  Helpful (0)Unhelpful (0)ReportAnswer this questionShow more answers (1)

Q: QuestionDoes this omit any ozone? Is it safe around pets? Saw something from this year saying it omits some ozone and my dog has been coughing ever since I put 2 of these in our home. Are they safe? Should I return both?

Asked 6 months ago by Adorable.

• A:Answer Thanks for your question! Our HEPASilent™ technology uses mechanical and electrostatic filtration to quietly and efficiently remove pollutants. Our Blueair air purifiers, including the Blue Pure 311i Max, meet CARB standards, are certified to Intertek’s Zero Ozone standards, and are completely safe for pets. Their design won’t cause coughing, and we recommend checking with your veterinarian since every pet is unique. If you need further support, our team is always happy to help.

  Answered 6 months ago by Blueair Support Team

  
  Helpful (0)Unhelpful (0)ReportAnswer this question

Q: QuestionAre these safe around pets? We have 2 and ever since we got these, one of our dogs has been coughing consistently, while the other does here and there. I want to make sure it’s safe or return them. Thank you.

Asked 6 months ago by Adorable.

• A:Answer We have a small dog and it has absolutely no effect on him.

  Answered 6 months ago by mrcoffeeVerified Purchase

  Helpful (0)Unhelpful (0)ReportAnswer this questionShow more answers (1)

Q: QuestionDoes this have a carbon activated filter

Asked 7 months ago by Anonymous.

• A:Answer Yes, the Blue Pure 311i Max comes with a particle + carbon filter designed to capture airborne particles such as PM2.5, pollen, dust mite matter, and pet dander allergens. It also helps reduce light household odors, including smoke and cooking smells. For more information, visit our website here: https://www.blueair.com/products/f3max-replacement-pac-filter-for-311i-max-1

  Answered 7 months ago by Blueair Support Team

  
  Helpful (0)Unhelpful (0)ReportAnswer this question