BLUEAIR Air Purifier for Home HEPA Air Purifiers for Pets, Allergies, Dust, Nursery, Office HEPASilent Techonolgy Air Cleaner for Small Rooms 432 sq ft coverage - Blue Pure 511
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Availability:
In Stock.
Arrives
Friday, Aug 14
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Style: Basic (No Auto/No Wifi)
Features
- COMPACT AND QUIET FOR FRESH AIR: Only Blueair air purifiers use HEPASilent technology; Blue Pure 511 air purifier quickly cleans up to 432 sq ft spaces in 30 minutes or 180 sq ft small rooms in 12.5 minutes with powerful yet whisper-quiet operation at just 24 dB on low speed
- HEPASILENT DUAL FILTRATION TECHNOLOGY: Removes at least 99.97% of airborne particles down to 0.1 microns; The tiniest particles, such as viruses and bacteria, are captured, while larger particles such as dust, pollen and smoke are also removed for cleaner air in bedrooms, nurseries and home offices
- EFFICIENT AND COMPACT: Certified by Energy Star as Most Efficient model; BlueairHEPA air purifiers are whisper-silent and use less energy than a light bulb while delivering 4.8 air changes per hour for optimal dust and pet dander elimination. Without taking up too much space enjoy fresh air with the touch of a button***
- PERSONALIZABLE DESIGN: Our most compact air purifier seamlessly fits into your home with three Scandinavian inspired washable pre-filter colors; you can personalize your air purifier to match your interior; Arctic Trail dark gray pre-filter included
- BLUEAIR REPLACEMENT FILTER: Blue Pure 511 Genuine Replacement Filter ;B08KPFWBGM fits Blue Pure 511 Air Purifier and is designed for optimal performance
- LETS CLEAR THE AIR WITH BLUEAIR: Our Blue Pure Max air purifier comes with one filter preinstalled and a pre-filter for easy set up; This product is made for NORTH AMERICA USE ONLY and should only be used with input voltages between 110-120V
Description
Blueair’s most compact air purifier. Only Blueair air purifiers use HEPASilent™ technology quickly cleaning up to 432sqft space in 30min or 180sqft small room in about 12.5min. The Blue Pure 511 air purifier combines plug-and-play simplicity with signature Blueair performance. Its compact footprint and low noise levels, makes Blue Pure 511 air purifiers ideal to place in a bedroom or office. On highest fan speed. Clean Air Delivery Rate (CADR) based on AHAM AC-1. 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. Sound pressure on low. A whisper is about 30 dB. Tested on PM 2.5 (0.1 - 2.5 microns) up to 90mins. "Light bulb" defined as LED light bulb with 40 watts energy consumption.
Color: Grey
Brand: BLUEAIR
Product Dimensions: 7.9"D x 7.9"W x 13.9"H
Power Source: Corded Electric
Item Weight: 5.2 pounds
Power Source: Corded Electric
Control Method: Touch
Filter Type: Activated Carbon
Floor Area: 432 square_feet
Noise Level: 24 db
Particle Retention Size: 0.1 micron
Controller Type: Button Control
Contaminant Filtration Capability: True
Special Features: Corded
Filter Class: HEPA
Item Dimensions D x W x H: 7.9"D x 7.9"W x 13.9"H
Item Weight: 5.2 pounds
Color: Grey
Brand Name: BLUEAIR
Model Number: 3131000000
UPC: 689122023182
Unit Count: 1 Count
Manufacturer: Blueair
Included Components: Air Purifier, installed filter, fabric pre-filter
Item Type Name: Air Purifier
Part Number: 109994
Specification Met: Energy Star Certified
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Friday, Aug 14
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
I’ve been looking for a solid air purifier that wouldn't break the bank, and after seeing this one for around $100, I decided to give it a shot. Honestly, it’s one of the best purchases I’ve made for my home recently. What I Love: Whisper Quiet: This was the dealbreaker for me. On the lowest setting (sleep mode), I can barely hear it at all. Even on the medium setting, it’s just a very gentle white noise that doesn't interfere with the TV or sleep. Noticeable Air Quality: I have a dog that sheds quite a bit, and within two days, the "stale" pet smell in my living room was completely gone. The air just feels... crisper. Sleek Design: It’s compact enough to sit in a corner without being an eyesore, and the controls are super intuitive. The Verdict: If you’re looking for something effective without spending $400 on a high-end brand name, this is the sweet spot. It does exactly what it promises and stays quiet while doing it. Definitely worth the $100 investment if you have allergies or pets!
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Reviewed in the United States on February 11, 2026 by Elizabeth Fishman
I just received this amazing, magical, fantastic device and HOLY COW does it work wonders. I bought this for my home office, which has been plagued by dust, cat dander, and whatever other crud builds up in my house. I constantly have to use compressed air dusters to keep my devices clear, but that just throws the particles into the air. I've tried other purifiers in the past, with mediocre results. This thing ran on medium speed for about a day and it's made a HUGE difference already. I no longer see the usual layer of ickiness across my desk, laptop, monitors, keyboard, etc. It's very quiet - I forgot it was even running until I realized how clean everything is! My coworker (an orange tabby named Tuck) is a little wary of it, but after a few hours he stopped glaring at it and went back to his regularly scheduled nap. Based on how great this works in my small office, I plan to get the larger capacity version for my open living room. I expect I'll be just as thrilled with that one.
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Reviewed in the United States on April 3, 2026 by Elizabeth S.
We have had this machine since around 2020 and it works great. I replace the inner filters every 6 months. The outer cover helps make the filter last longer. It had various speeds and noise levels. Overall I would say it’s quiet. It helps reduce dust accumulation, smells and allergies. It is very lightweight and portable, it has been a great value and is still running great five years later. My only complaint is that I have to reset the filter notification. Sometimes it takes me a bit a couple of attempts to reset the notification lights.
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Reviewed in the United States on January 26, 2026 by Amazon Customer
I like the effectiveness of this air purifier so as far as performance goes, I think it should have five stars. Since there’s no way of testing air quality and we just have to go on faith, I’m guessing that it’s a good quality machine. However, clearly it was designed with aesthetics in mind and not practicality. It’s difficult to turn on an off or to know how to turn it higher or lower. You do this with a series of taps on the top ring. It’s very Star Trek in a very unnecessary way. I love Star Trek. I love everything about Star Trek. I don’t think even they would’ve kept this on the enterprise because it’s too annoying to use , however, having said that I just turned mine on low and keep it on all the time. I have noticed that environmental allergies bother me much less this year. If you are into the super modern look and have the gray walls that all designers think everyone should have now, you might love this look and usage facility might not bother you. I don’t think an older person would be able to use this easily. The only thing that lets you know if it’s on or off is a light that shines for a moment when you tap it. There is delay in the action so you don’t know if you’ve actually turned it up higher or turned it off for a few seconds, so if you’re impatient like me and tap it again, you’ll probably accidentally turn it off and have to start all over again . Again, weird design, leaving you confused. Is very silent and that’s a big plus. It probably deserves one more star, but I’m too annoyed with the lack of the on and off clarity to increase my stars. Here’s an idea, how about somebody make a vintage looking air purifier with simple on off switches, make it look like a vintage radio. I bet that would be a big seller, the nice old-fashioned knobs. On and off. I have no idea how I’m going to change the filter when it’s time to change it, the whole thing is a mystery as to how it’s assembled, and I wish they would just include a few extra filters with the purchase so then you weren’t trying to figure out what kind of machine you have and which kind of filters to buy six months later. I’d be willing to pay extra to have the extra filters delivered with the purchase. If I sound annoyed it’s because I am. But I’m sure the machine is good quality. Updated review 9/11/24: The machine is actually silent on low. It’s been on all day and I didn’t even know it. You literally cannot hear it at all on its lowest setting. It also did a great job getting rid of a smell that was from something burned in my kitchen. So it is a very effective machine. I also now am wondering if the thing that I found fault with is actually a benefit to older people with arthritis if they cannot turn a knob, then just tapping the top might be very helpful to them. In fact, anyone with mobility issues could put this beside their bed and just tap it at night in the dark and it would be easy to use for them. Because it is silent, it will not work for you as a white noise machine. I’m now going to add a star. Xo
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Reviewed in the United States on September 10, 2024 by Mom at home
It has been a great addition to my workspace. I’ve been using it at work, and it has noticeably helped with my allergies by improving the air quality around me. It runs quietly and efficiently, making it easy to keep on throughout the day without being distracting. Overall, it’s been a reliable and effective air purifier that has made a real difference in my comfort.
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Reviewed in the United States on May 10, 2026 by Amazon Customer
This Blueair air purifier is pretty amazing. I should preface by saying my husband and I are both indoor vape users. I was worried an air purifier wouldnt be effective because of this fact. Add in that we have two large dogs and 4 indoor cats. - Blueair proved me wrong. So I bought this unit in May 2025. It's now the 20th of November and the filter JUST turned red promoting me to replace it!!! Holy cow! That's an amazing value and effectiveness!! It made a huge difference this entire time with lowering the smell of dog and indoor air pollution I could constantly smell in this home of ours. We have an older home with fixed windows, add in the 4 indoor cats and the inability to leave the doors open to let in fresh air regularly thanks to the constant Florida heat and humidity, and I was always feeling like the air was just stale and gross in here, even before the vaping came into account. But this air purifier has been a game changer. It was so easy to set up, so easy to maintain and clean (both regular maintenance and with washing the exterior cloth filter) and replacing the interior filter took no time at all. Highly recommended product!!
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Reviewed in the United States on November 20, 2025 by TheycallmeShorts
I wish we had one one these in every room in our house. Our pets are shedding now in the summer heat and the BlueAir purifier picks up not only dust and pollen but also fur and pet dander. This guy is worth every cent we paid for it.
Reviewed in the United States on June 23, 2026 by Nikki
As far as doing the job - removing dust and pollutants from the air - it pretty much works like most other "air purifiers" available with HEPA filters. The design is a bit stupid. I thought the fabric (with a choice of colors) that fit around the bottom portion was for looks. I was surprised when I realized it was the prefilter. So all the larger particulates and dust sit on the outside of the unit until you decide to take it off and wash it. I found that all that collected material didn't want to stay put there - especially if you pick up or move the unit - the prefiltered material comes off to hopefully be prefiltered again. Removing this outside fabric isn't easy without getting your fingers into the HEPA filter that it covers, and putting it back on can be a bit of a battle. Unless you buy a second fabric prefilter the unit is out of service until you can wash and dry it unless you run it without a prefilter. Nicely the fabric for the prefilter comes in a wide choice of two colors - I chose to get the other one for variety, lol! Your home decorator may find that ruins their carefully thought-out color scheme for the room - not that the two choices are all that different. I was hoping for maybe something in a bright red as a contrast to the blue or grey offered, but no such luck. When they say you have a choice in colors it's sort of like the old Ford automobiles that advertised you could buy them in any color as long as it was black. Criticizing the fabric colors is a bit picky - it's the idea of the prefilter open to the air as the outside cover for the HEPA filter, the difficulty of removing, washing, drying then putting it back on while the filter is unusable that's stupid. Having a reusable prefilter does save buying a new one every time it gets dirty. Whether the trade-off for that is worth it is a personal choice. It's also one I wasn't aware of when I bought it. Much is made in the literature (instructions) of the Scandinavian design of the filter invoking that clean snowy air. I think a better design would have been more useful. It's just a round HEPA filter covered in removable fabric acting as the prefilter, with the entire removable plastic top portion just where the fan sits. Oh, I almost forgot - I'm also not wild about the power cord entering the unit near the top - where the fan is - making keeping it out of the way wherever you put the thing a pain. Having it enter at the bottom and running it inside to the fan would make more sense, which would keep the thing from falling over if the cord gets pulled. All in all, it's cute and different from the rest of the HEPA air filter choices. It does the job. Putting style over function just to be different, making the prefilter the outside covering, and needing to either buy a second prefilter or have the unit out of action while you wash and dry the prefilter before replacing it is where it loses stars in my rating.
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Reviewed in the United States on April 8, 2024 by Ottovonbismark