Place it almost anywhere

Compact 360° air intake gives you powerful cleaning without limiting where it can live

Smarter cleaning on autopilot

Built-in sensors detect changes in your air and automatically adjust cleaning

4.6

Rated 4.6 out of 5 stars

4.6 Stars (2,249 Reviews)

Blue Pure 511i Max

Name: Blue Pure 511i Max
Brand: Blueair
Price: 139.99 USD
Availability: InStock
Rating: 4.6 (2249 reviews)

Smart HEPASilent™ air purifier for medium rooms, bedrooms and home offices with fast, quiet cleaning that adjusts automatically.

Designed for

Medium rooms, bedrooms, home offices

Great for

Allergens, pets, smoke

One Time Shipment

1 Air Purifier
1 Particle & Carbon Filter
1 Pre-Filter in Stockholm Fog

2 Replacement Filters
Save 15% on every filter
Pay when we send it

Select Filter Type

Save 15% on every filter

Free & fast shipping
30 day home trial
Free extended warranty

Why you’ll love it

Smart, quiet clean air for the spaces you spend the most time in. Powerful purification for fresher rooms, restful nights and more comfortable days.

Quickly cleans 237 ft² every 12.5 minutes & 1,138 ft² in 1 hour
Refreshes bedrooms and everyday spaces fast
Automatically adjusts when your air changes
Runs whisper quiet for sleep and focus
Gives you easy control at home or away

Auto Mode keeps cleaning effortless
Specialized filters for your needs
Accurate filter lifetime tracking
Control from anywhere

Features & Technologies

HEPASilent™ technology captures 99.97% of tiny airborne particles
Integrated sensors continuously monitor your air
360° air intake helps clean the whole room efficiently
3 fan speeds let you choose your cleaning power
Auto Mode adjusts fan speed based on detected pollutants
Night Mode keeps cleaning quieter while you sleep
Wi-Fi connectivity gives you easy app control
RealTrack Technology® accurately tracks filter life
Washable pre-filters let you customize the look

What’s in the box

Tech specs

Dimensions(HxWxD) 14.5” x 9.3” x 9.3”
Product Weight 4.2
Energy Consumption 17 W
Sound Level 19-48 db
Air Outlet Top
Recommended Room Size 237
Number Of Filters 1

Customize your purifier

Pre-Filter|Sand

$8.99

AllergenBlock Filter

$44.99

SmokeBlock Filter

$38.99

Place it almost anywhere

Compact 360° air intake gives you powerful cleaning without limiting where it can live

Smarter cleaning on autopilot

Built-in sensors detect changes in your air and automatically adjust cleaning

Why choose Blue Pure 511i Max?

Perfect for busy families

The "Welcome Home" feature automatically turns the purifier on when you're near and off when you leave, so your family always returns to a clean, safe environment without any extra effort.
Whisper quiet when you need it most

A sound level as low as 19 dB, the Blue Pure 511i Max operates quietly, ensuring it won’t disturb you or your family.
Kid-friendly design

Equipped with a compact, rounded shape, and display lock, the Blue Pure 511i Max is designed to fit seamlessly into any room without sharp edges, making it safe for children’s bedrooms or play areas.
Reliable air quality insights

Monitor indoor & outdoor air quality, set schedules, and have 24/7 control of your air purifier in the trusted Blueair app.

“I love that I can operate it from anywhere with the app. I can get it going before I get home from being outdoors. It is a very quiet machine. It has night mode and will dim or turn off all lights on the machine.”

Lesann

“I like having a one for each high-traffic room such as our master bedroom, office, and living room. Although this one was intended for our office, it is by far the most attractive air purifier I have yet to see, so I swapped it for the one we had in our living room.”

MrsAdams

“The unit will automatically adjust according to the air quality, and there is a light indicator letting you know how it accesses the value. You can also set it manually, with three fan speeds, and wireless capabilities.”

Kmill

4 layers of filtration remove
99.97%¹ of airborne pollutants

HEPASilent™ technology combines electrostatic and mechanical filtration to capture tiny airborne pollutants like pollen, dust and smoke, faster* and quieter⁴ than traditional HEPA.

Meet our filters

Particle & Carbon

Our original filter. Removes allergens and traps light household odors from pets, cooking and smoke
SmokeBlock

2x more activated carbon than our original filter. Removes up to 99.99%³ of wildfire smoke
AllergenBlock⁵

Extra protection against allergens. Traps and neutralizes dust, pollen and pet dander

Exclusive features in the highly rated Blueair app

Effortlessly take control of your air

Pick your fan speed, let auto or night mode take over & keep settings secure with display lock.
Custom Schedules to Fit Your Lifestyle

Set your preferred times for enhanced air purification, so you can wake up to fresh air, keep your home clean during peak hours, and save energy when you're away.
RealTrack Technology®

Tracks your filter lifetime based on pollutant levels and alerts you when it’s time to replace your filter.

Free and fast shipping
30 day home trial
Extended warranty

FAQ

What pollutants does the Blue Pure 511i Max filter out?

Our HEPASilent™ dual filtration technology removes 99.97%¹ of airborne particles down to 0.1 microns, ensuring pollen, cooking odors, smoke, dust, pet dander, mold, chemicals, allergen matter and even tiny particles such as viruses and bacteria², are captured with minimal noise and energy consumption.

What room size is best for the Blue Pure 511i Max?

What are the noise levels of the Blue Pure 511i Max?

How often do I need to change the filters?

Your filter will last up to 9 months thanks to our proprietary RealTrack algorithm that accurately calculates the remaining filter lifetime based on fan speed, usage time and pollution levels.

When it's time to replace the filter, the filter replacement LED on the interface will turn red to remind you. Alternatively, connect to the Blueair app to receive an alert and easily re-order at the touch of a button.

What is the warranty for the Blue Pure 511i Max?

Technical Specifications

Dimensions(HxWxD)

14.5” x 9.3” x 9.3”
Product Weight

4.2 lb
Energy Consumption

17 W
Sound level

19-48 db
Air outlet

Top
Recommended room size

237 ft²
Air changes per hour (ACH)

4.8
Clean air delivery rate (CADR)

Pollen 174 cfm
Dust 159 cfm
Smoke 153 cfm
Number of filters

1
Speed control options

1 - 2 - 3 - 4 - Auto - Night

4.6

Rated 4.6 out of 5 stars

Based on 2,249 reviews

88%would recommend these products

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2,249 reviews

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LC
Line C.
Verified Buyer
4 minutes ago
Reviewing
Blue Pure 211i Max
Rated 5 out of 5 stars
J’adore!
Ce purificateur d’air atteint toutes mes attentes. Maison de fumeurs et réussi à garder l’air fraîche et sans fumée. Ma belle-sœur était très impressionné et a decidé d’en acheter une pareil comme moi. Bravo pour ce produit très efficace.
Was this helpful?
LM
Louise M.
Verified Buyer
3 days ago
Reviewing
Blue Pure 211i Max
Rated 5 out of 5 stars
Third Blueair in my home
Easy to setup for the best clean air.
Was this helpful?
AL
Angela L.
Verified Buyer
3 days ago
Reviewing
Blue Pure 311i+ Max
Rated 5 out of 5 stars
Whisper Quiet!
We replaced an older air purifier of a different brand with the Blue Pure 311+ Max based on research and the Consumer Report ratings. Thus far, we've been very pleased with it. Very easy to set up, and it is very quiet on the low-mid settings . We've not had to use the highest setting but did check it and even that, while audible, would not be too loud if we had a group over. I like the accessibility of the controls on top, and being able having one for night time which eliminates the lights. Also like having a choice of replacement filters and will try the allergen one next time.
Was this helpful?
LA
Lena A.
Verified Buyer
4 days ago
Reviewing
Blue Pure 311i+ Max
Rated 5 out of 5 stars
Very satisfied
We are enjoying the 311+ air purifier and its many features.
The app helps to understand when and what may cause the indoor air to require more air purifying. This was proven when doing some major cooking and the stats on the app showed the operation of the purifier increase then and how quickly clean air was restored.
Was this helpful?
SA
Suzanne A.
Verified Buyer
4 days ago
Reviewing
Blue Pure 211i Max - Midnight
Rated 5 out of 5 stars
Works great!
It’s quiet and has made a noticeable improvement in our air quality
Was this helpful?

¹ Tested on PM 2.5 up to 90 mins

² Based on ELISA deactivation testing of Pollen (Cry J1), Pet Dander (Fel d1, Can F1), Dust Mite Matter (Der f1) on the filter media in 60 minutes.

³ Compared to standard in-unit filter. Based on removal testing of particles 0.4-0.7 μm in 60min in a 30m3 room. Performance may vary.

⁴ When similar CADR was measured, Blueair models with mechanical and electrostatic filtration achieved less noise with less energy than same models with only H13 HEPA mechanical filtration.

⁵AllergenBlock refers to inanimate allergens pollen, dust and pet dander.

*Comparing CADR performance of Blueair models with mechanical and electrostatic filtration vs same models with only H13 HEPA mechanical filtration.

Note: CADR and room size values have been updated to meet new DOE standards. Website listings reflect the most accurate information. You may notice slight differences versus product packaging during the transition.

DreamWell Mini Cleaning Guide + -

Water Tank
The water tank is dishwasher-safe. You can also hand-wash it using mild detergent and warm water. Never use bleach, harsh chemicals, or chemical solvents.

Wick Filter
Clean the wick filter every 2–4 weeks. Soak the wick in a descaling solution using 1 descaling packet per tank of water for 2 hours, then rinse thoroughly with clean water.

Be sure to replace the wick filter every 6 months for optimal performance.

Bi-Weekly Cleaning Guide + -

To keep your DreamWell Humidifier performing at its best, Blueair recommends cleaning it at least once a week, or twice a week with regular use. Always disconnect the device from power before cleaning.

Water Tank

Clean the water tank with a mild detergent, or place it in the dishwasher.
Dry the water tank thoroughly before reassembling the humidifier.

Wick Filter

Soak the wick filter in a citric acid solution (20 g of citric acid per 1 L of water) for 1 hour. If needed, you can soak it for up to 2 hours.
Rinse the wick thoroughly under running tap water before reinstalling it.
If you have the DreamWell mesh fabric replacement wick, it can be machine washed on a gentle cycle.

Upper Body

Wipe the exterior with a soft, dry, or slightly damp cloth to remove dust.
Do not submerge the upper body in water.

Invisible Mist Monthly Descaling Guide + -

Follow the steps below to safely and effectively descale your humidifier using citric acid descaling powder. Before you start be sure to unplug the device, remove the visible scale from the inner tank surfaces by rinsing with fresh water and wiping with a clean towel.

Step 1: Prepare the Descaling Solution

For regular maintenance (2% solution – recommended monthly):

Mix 1 pouch (1 oz) of descaling powder with 2 L (0.5 gallons) of water

For heavy scale or pump issues (4% solution):

Mix 2 pouches (2 oz) of descaling powder with 2 L (0.5 gallons) of water

Fill the tank with water first, then add the descaling powder and mix well.

Step 2: Soak the Pump and Tank

Remove the sponge pre-filter from the pump.
Place the sponge pre-filter into the tank.
Submerge the pump into the tank according to normal assembly instructions.
Ensure the bottom half of the pump is fully submerged in the descaling solution.
Allow the pump and tank to soak for 2 hours.

Step 3: Rinse and Reassemble

After 2 hours, remove the pump from the tank.
Rinse the pump and tank separately under fresh water.
Reassemble the device.
Fill the tank with fresh water before the next use.

DreamWell Monthly Descaling Guide + -