The most powerful, compact air purifier

7 stages of filtration, 10x more odor removal

Customizable design to make it yours

Choose from 6 pre-filter colors & 2 base accessories

4.5

Rated 4.5 out of 5 stars

4.5 Stars (320 Reviews)

Blue Signature™ Large

Name: Blue Signature™ Large Midnight
Brand: Blueair
Price: 449.99 USD
Availability: InStock
Rating: 4.5 (320 reviews)

HEPASilent™ air purifier for extra-large rooms with fast whole-room cleaning and advanced odor removal from OdorFence Technology.

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Designed for

Open concept, kitchens, living rooms

Great for

Odors, allergens, pets, high traffic areas

Size: Large

Color: Midnight

One Time Shipment

1 Air Purifier
1 Particle & Carbon Filter
1 Pre-Filter

1 Replacement Filter
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

The most powerful, compact air purifier you can get. Your all-in-one solution for cleaner air, fresher rooms, and total everyday well-being.

Quickly cleans 705 ft² every 12.5 minutes & 3,385 ft² in 1 hour
Helps clear stubborn odors across the whole room
Keeps up with changing air quality automatically
Customizable design lets you make it your own

Accessories designed to fit your style
Motion activated touchscreen display
Accurate filter lifetime tracking
Doubles as a table-top

Features & Technologies

HEPASilent™ filtration captures 99.97% of tiny airborne particles
OdorFence Technology™ provides powerful odor removal
Smart sensors track your air quality in real time
Auto Mode adjusts fan speed based on your air quality
Night Mode keeps cleaning quieter while you sleep
Eco Mode saves energy when air quality is good
Motion activated controls appear when you need them
RealTrack Technology® accurately tracks filter lifetime
Wi-Fi connectivity gives you easy app control

Tech specs

Dimensions(HxWxD) 17.2" x 15.5" x 15.5"
Product Weight 13.2 lbs
Energy Consumption 3.5-42 W
Sound Level 23-55 dB
Air Outlet Side
Recommended Room Size 705 ft²
Number Of Filters 1

Pre-Filter|Nordic Fog

$24.99

Wood Leg Base

$79.99

Chrome Ring Base

$99.99

The most powerful, compact air purifier

7 stages of filtration, 10x more odor removal

Customizable design to make it yours

Choose from 6 pre-filter colors & 2 base accessories

Why choose Blue Signature™?

Doubles as a table-top & much more

Make it yours. Choose from curated pre-filter colors and accessories that elevate your space.
Dynamically displays your air quality

See your air quality at a glance. The motion-activated display responds to your preferences in real time.

7 stages of filtration,
10x more odor removal

HEPASilent filtration technology captures at least 99.97%² of tiny airborne pollutants down to 0.1 microns while OdorFence Technology captures common odor gases and breaks them down. It’s deep, effortless clean air you can feel, and smell, every day.

"The Blueair Blue Signature finally gives design-conscious homeowners an air purifier they won't want to hide."

YANKO DESIGN

“I tested it with kitchen odors while cooking, and within about 20 minutes of running the air purifier, I could smell little to nothing. I find that astonishing. I've used other air purifiers before, but this one does the trick.”

Jake

Smart control in the highly rated & newly upgraded Blueair app

Effortlessly take control of your air

Select a fan speed, let auto or night mode take over & keep settings secure with display lock.
Customize 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.
Smart filter lifetime tracking

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

Feel the difference with Blue Signature™

95%

felt it contributed to a
healthier living environment⁵

89%

prefer it over any
other air purifier⁵

<p>Feel the difference with Blue Signature™</p>

Proud to be a Certified B Corp

As a B Corp, we’re part of a global community of businesses that meet high standards of social and environmental impact.

Free and fast shipping
30 day home trial
Extended warranty

Technical Specifications

Dimensions(HxWxD)

17.2" x 15.5" x 15.5"
Product Weight

13.2 lbs
Energy Consumption

3.5-42 W
Sound level

23-55 dB
Air outlet

Side
Recommended room size

705 ft²
Air changes per hour (ACH)

4.8
Clean air delivery rate (CADR)

Pollen 450 cfm
Dust 434 cfm
Smoke 455 cfm
Number of filters

1
Speed control options

1 - 2 - 3 - 4 - Auto - Night

FAQ

What is the warranty for Blue Signature™?

How often do I need to change the filter?

You filter will last up to 1 year thanks to our unique patent-pending design & 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 are the noise levels?

What room size is best?

4.5

Rated 4.5 out of 5 stars

Based on 320 reviews

85%would recommend these products

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320 reviews

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BW
Brian W.
Verified Buyer
3 minutes ago
Reviewing
Blue Signature™ Large Nordic Fog
Rated 5 out of 5 stars
Good purifier
Very quiet, and nice, and strong,
Was this helpful?
JP
JONATHAN P.
Verified Buyer
5 days ago
Reviewing
Blue Signature™ Large Nordic Fog
Rated 5 out of 5 stars
Amazing
Within 24 hours my house smelled fresh and crisp. Works great, especially if you have pets!
Was this helpful?
DP
David P.
Verified Buyer
6 days ago
Reviewing
Blue Signature™ Small Midnight
Rated 5 out of 5 stars
good
very good
Was this helpful?
ET
Elizabeth T.
Verified Buyer
6 days ago
Reviewing
Blue Signature™ Large Midnight
Rated 5 out of 5 stars
Blue Signature large
I own four of the large Blue signature
Air purifiers and also
The Blue Pure 311i
Max changed our lives. We breath better, feel better the
air through out the
home is fresh clean
air. We love them.
Was this helpful?
DW
Deana W.
Verified Buyer
1 week ago
Reviewing
Blue Signature™ Small Nordic Fog
Rated 5 out of 5 stars
Small but mighty!
I couldn’t be more happy with my Blue air purifiers. Noticeable improvement in my overall quality of life, breathing is not longer a struggle.
Most importantly my migraines have lessened.
Being able to utilize my Hsa/Fsa funds made this possible. Happy customer!
Was this helpful?

¹ Based on high-speed CADR by volume vs. similar competitive models

² Tested on PM2.5 up to 90 minutes.

³ Tested on Acetaldehyde gas vs. similar leading competitor filter

⁴ Tested on bacteria (S. aureus, K. pneumoniae, P. aeruginosa), virus (MS2) and mold allergen (A.niger) with a minimum reduction rate of 99.9% in 60min. Blueair does not claim to prevent transmission of airborne illnesses. Not tested on SARS-COV-2.

⁵ Based on consumer testing of 38 users over the course of 4 weeks

⁶ Compared to Blue Pure 211+

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