BLUEAIR 3131000000 Air Purifier: HEPASilent dual filtration technology
Meet the Blueair Blue Pure 511—the little air purifier that could. It's Blueair's most compact model, but don't let its size fool you. Thanks to that nifty HEPASilent™ tech (exclusive to Blueair, by the way), it can freshen up a 432sqft space in just 30 minutes. Got a cozy 180sqft room? It'll have that feeling crisp in about 12.5 minutes.* Simple to use? Check. Powerful? Absolutely. And with its sleek design and quiet operation, it's perfect for tucking into your bedroom or office without a fuss.
- On its highest fan speed, this little powerhouse delivers clean air like a champ. (Yeah, we're talking CADR based on AHAM AC-1 standards.)
- Ever wondered about air changes per hour (ACH)? It's basically how much fresh air gets swapped into a room over time. This purifier's got that covered.
- At its quietest, it's about as loud as a whisper—around 30 dB. So, no, it won't keep you up at night.
- We put it to the test against PM 2.5 particles (those pesky 0.1 - 2.5 micron ones), and it passed with flying colors in up to 90 minutes.
- And just so you know, when we say 'light bulb,' we mean an LED one that sips just 40 watts. Because who's got time for high energy bills?
- Compact for fresh air
- Powerful yet whisper-silent
- Personalizable design
- Efficient and compact
- Blueair replacement filter
- Let’s clear the air with Blueair
- Air changes per hour (ACH): 4.8
- HEPASilent dual filtration technology
General specs
- Brand: BLUEAIR
- Model: 3131000000
- Seller: Amazon
- color: Grey
- product_dimensions: 7.9"D x 7.9"W x 13.9"H
- floor_area: 432 Square Feet
- specification_met: Energy Star Certified
- noise_level: 24 dB
- particle_retention_size: 0.03 Percentage
- controller_type: Button Control
- upc: 689122023182
- manufacturer: Blueair
- item_weight: 5.24 pounds
- country_of_origin: China
- item_model_number: 3131000000
- care_instructions: Hand Wash
- assembly_required: No
- number_of_pieces: 1
- batteries_required: No
- included_components: Air Purifier, installed filter, fabric pre-filter
- First listed by seller: 6/15/25
If you are interested in more details, you can find full information on the seller's page.
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Comparison with similar products
| This item | Recommendations | |||||
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BLUEAIR 3131000000 HEPASilent dual filtration technology
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BLUEAIR 3232111100 HEPASilent dual filtration technology
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Air Purifier with True HEPA Filter True HEPA Filter
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| Brand | BLUEAIR | BLUEAIR | BLUEAIR | BLUEAIR | BLUEAIR | |
| Model | 3131000000 | 3132111100 | 3232111100 | 311i Max | 3613111100 | |
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| Price | $89.98 | $119.99 | $169.99 | $199.99 | $279.99 | $23.99 |
| Seller | Amazon | Amazon | Amazon | Amazon | Amazon | Gshopper |
| Update | June 26, 2025 | August 5, 2025 | June 28, 2025 | June 28, 2025 | August 5, 2025 | July 25, 2024 |
| product_dimensions | 7.9"D x 7.9"W x 13.9"H | 10.6"D x 10.6"W x 18.9"H | 10.6"D x 10.6"W x 18.9"H | |||
| floor_area | 432 Square Feet | 526 Square Feet | 1052 Square Feet | |||
| specification_met | Energy Star Certified | HEPA Certified | Energy Star Certified | |||
| noise_level | 24 dB | 48 dB | 18 dB | |||
| controller_type | Button Control | Button Control | Amazon Alexa, Button Control, iOS, Android | |||
| item_weight | 5.24 pounds | 2.84 pounds | 7.5 pounds | |||
| country_of_origin | China | China | China | |||
| included_components | Air Purifier, installed filter, fabric pre-filter | Air Purifier, pre installed filter, and pre installed fabric pre filter | Air purifier, pre-installed replacement filter, washable fabric pre-filter | |||
| Noise Level | 23-50dB | 23 dB | Quiet | |||
Air Purifier
Isla T.
Manchester
June 20, 2025
as someone who's not great with tech, i was a bit nervous about buying this, but it's turned out to be a lifesaver for my allergies and just making my home feel nicer. i got it as a gift for myself, and it's been a game-changer—i can actually breathe easier now, especially with all the city pollution in manchester. one hack i found: placing it near my bed helps a lot overnight, and it uses very little energy, which is a bonus for my bills. overall, it's extremely effective, but it could be a tad more user-friendly for newbies. still, i'd recommend it to friends, even with the minor quirks.
- Pros: i absolutely love how this thing cleans the air so quickly in my small flat—it makes everything feel fresh and crisp in no time. the design is really sleek and fits perfectly in my bedroom without being an eyesore, and it's extremely quiet, almost like a whisper, so it doesn't disturb my sleep or reading. plus, it's super easy to use right out of the box, no complicated setup needed.
- Cons: it took some faff to figure out the best settings at first, and i could be wrong, but it feels a bit pricey for what it does. also, on the highest speed, it's a bit louder than i'd like, though not terrible. i wish it came with more guidance for beginners like me.