Blue Signature™ Large - Midnight

Name: Blue Signature™ Large - Midnight
Brand: Blueair
Price: 449.99 EUR
Availability: OutOfStock
Rating: 4.7 (79 reviews)

Air Purifier, Extra-large Rooms

4.7

Rated 4.7 out of 5 stars

79 Reviews

Powerful filtration. Advanced odor removal.

Rapidly cleans 35 m² in 12.5 minutes & up to 314 m² in 1 hour
7 stages of filtration removes 99.97%² of airborne particles
Advanced odour removal with OdourFence Technology
Dynamic display that auto-adapts to enhance your air
Double the filter lifetime thanks to our patent-pending filter design
Smart features in the highly rated, newly improved Blueair app
Device comes with 1 pre-filter in Fog and 1 Particle & Carbon filter

Motion activated touchscreen display
Accurate filter lifetime tracking
Doubles as a table-top

Additional Features

Wi-Fi connectivity for remote control Yes
On/ off timer Yes, via Blueair App
Speed control options 1 - 2 - 3 - 4 - Auto - Night
Integrated air sensors Yes

Shipping & Warranty

Free & fast shipping
30 day home trial
Free extended warranty

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 unit looks well designed from the get-go and has a flat top for a plant. It looks great in any room and doesn't scream, ‘I'm an appliance.’”

Alyssa

“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

97%

find it easy to use
and maintain⁵

Feel the difference with Blue Signature™

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)

437 x 393 x 366 mm
Product Weight

6 kg
Energy Consumption

3.5-42 W
Sound level

23-55 dB
Air outlet

Side
Recommended room size

67 m²
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?

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+

4.7

Rated 4.7 out of 5 stars

Based on 79 reviews

Total 5 star reviews: 66 Total 4 star reviews: 8 Total 3 star reviews: 2 Total 2 star reviews: 1 Total 1 star reviews: 2

94%would recommend this product

Slide 1 selected

Write a Review (Opens in a new window)

79 reviews

Sort

S
Sean
Verified Buyer
I recommend this product
Rated 5 out of 5 stars
1 month ago
This air purifier saved my family's home from a potential house fire!
In early Feb 2026, while we were sleeping at 2am our Blue Signature purifier in our bedroom went to the highest setting while on auto mode. This woke my husband up, so I checked my app to see what the air quality was and it was very poor. As I started to doze back to sleep, I started to smell smoke. When I opened my door it immediately smelled like burning wood. I went downstairs to find smoke coming out of our gas furnace. The air purifier detected the smoke before our fire alarms would have went off. When the fire department arrived they later told us another 30 minutes to an hour later the walls could have caught fire and potentially burned down our house. We later moved the air purifier into a main space and it helped remove the smell of smoke that lingered in our home over the next few days.
We have had this air purifier for several months and it does a great job. My family does a lot of home cooking and it really helps remove the smell of food odor that lingers in our bedroom. The purifier is also great at removing dust from the air, which was another reason for why we purchased it. I have and will continue recommend this purifier to others!!
Was this helpful?
BlueEU Staging
1 month ago
Thank you so much for sharing this incredible experience. We are truly grateful that your Blue Signature Midnight was able to alert you to the smoke so quickly. Knowing it helped protect your home and family means everything to us.

We are also glad it continued supporting you by clearing lingering smoke and everyday cooking odors. Thank you for your trust and recommendation. Stories like yours remind us why we do what we do.
P
patrycjap4_6479
I recommend this product
Rated 5 out of 5 stars
4 months ago
Great
Amazing product. Purifies room, serves as small table. It’s very easy to use and control. Looks amazing and it’s possible to customize to match with room.
Was this helpful?
M
miamua_1832
I recommend this product
Rated 5 out of 5 stars
5 months ago
effectively protecting my kid's room from secondha
We have a major issue with cigarette smoke from our downstairs neighbors seeping into our apartment, especially into my child's bedroom. I decided to try the Blueair Blue Signature specifically for this problem, and the effectiveness has been a relief. It noticeably cuts down on the smoke odor, and the smart display often shows the air quality improving after it kicks on. Knowing it's capturing those pollutants makes me feel much better about the air my kid is breathing. It's quiet enough to run all night on a low setting without disturbing their sleep. For any parent in a similar situation, the value for money is in the durability of our health. It's a small machine that tackles a very big problem.
Was this helpful?
HH
Hip H.
I recommend this product
Rated 5 out of 5 stars
5 months ago
Beautiful Midnight Purifier
It does exactly what it is suppose to do. I purchased the wooden stand it is perfect in the family room. It completes my Apple HomePod which also has wooden stand
Was this helpful?
S
syanacek_6016
I recommend this product
Rated 5 out of 5 stars
7 months ago
Great for home
This air purifier works so well. My husband has asthma so this is great for our house, we have all noticed a huge difference. I like how compact and durable this is. The price is fair for how long I will use this for.
Was this helpful?

Your cart