Blue Pure 511i Max

Blueair

Blue Pure 511i Max

8 positive 0 neutral 4 negative

Based on 12 Reddit mentions

What people are saying

Discover what users really think based on Reddit discussions.

Apartment smells like weed

Going through this as well. I went to Best Buy and got 2 Blueair 511i Max air purifiers. Took like 30 minutes and the smell is 98% gone. It's coming from our bathroom. It shares a vent and fan with them. I figured that our because the closet that shares a wall with them and is right next to the bath

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lacmicmcd in r/Apartmentliving

May 24, 2025 6:28 AM

4

Please help me not waste money

Since you want to purify your whole 1300sq ft living space, do you have forced air heat and AC? If so, you can get a MERV 8 furnace filter that will work very well. If you don’t have forced air hvac, the box fan CR filter is the next best thing for the large living space. Otherwise for bedrooms, I r

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johnb300m in r/AirPurifiers

April 4, 2026 2:54 PM

2

Replacement filter help

My spec is 511i and Amazon lists it as available however when I order it they give me the wrong one, they give me the 511 one which doesn’t fit my purifier. I have gone in person to blueair trusted sellers and they have also given me the wrong one

Molmuzz26 in r/Blueair

April 4, 2026 10:16 AM

1

How does everyone deal with the fumes that comes off the 3D Printers that don’t have an Enclosure?

I went with the BlueAir Pure 511i Max. I have others for the whole home, and chose this one for next to my printer because it is much quieter than is typical for a HEPA air purifier.

Hungry_Hat1730 in r/BambuLabA1mini

April 2, 2026 1:30 PM

1

New to Air Purifiers - please help

Medify MA-25 is stronger for smoke; Blueair 511i is only good for small rooms Any idea why the Blueair is more expensive than the Medify, though?

Iris-Sofia in r/AirPurifiers

January 7, 2026 6:43 AM

1

Filter turning black after a day

We use the Blueair 511i air purifiers set to auto 24/7. The filter will need to be changed about every 7 or 8 months. We have been very happy with them.

No_Beginning2044 in r/CPAP

January 31, 2026 3:11 AM

1

Levoit Core 200s vs 300 vs 300s for 20m2 bedroom with the priority for silence, Europe (PL).

One more thing: you say you want Levoit, but if noise is the most importantly thing you should look into the Blueair 511i Max. They “ionize” dust particles so they stick to the filter, and that allows them to run the fan at lower speeds while keeping similar pm2.5 filtration capabilities.

mjsarfatti in r/AirPurifiers

November 30, 2025 11:22 AM

1

Would an Air Purifier help solve this problem?

Yes, an air purifier would definitely help in the bedroom, but it must have one that uses carbon filters, not just HEPA ones. Price wise, since the room is only 121 sq. ft., you can go with a smaller room air purifier, but the most inexpensive ones may not work that well in a smoky room. I would sug

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Blowingleaves17 in r/AirPurifiers

February 5, 2026 8:12 AM

1

Is the consensus Coway Air Purifiers?

I just bought a blueair 511i Max because it's supposed to be the quietest and I'm underwhelmed. I bought it for a small living room to keep the air fresh and it seems to create a dusty odor instead? There's also an audible machine whir even on the lowest setting. I'm considering sending it back and

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Creative-Sky237 in r/AirPurifiers

February 17, 2026 4:57 PM

1

Cat fart fan

I just put an air purifier next to my LR4. No smells at all. And that water bowl doesn’t belong there. Cats don’t like to eat and drink near where they poop. It’s a Blue Pure 511i Max. Small. Quiet. My LR4 is no where near a window.

yankinwaoz in r/litterrobot

August 22, 2025 3:05 AM

1

Top alternatives in Air Purifiers

#1
Core 300

Levoit

Core 300

$84.99

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