Blue Signature™ Large

Name: Blue Signature™ Large Midnight
Brand: Blueair
Price: 369.0 GBP
Availability: InStock
Rating: 4.4 (233 reviews)

Air Purifier, Extra-large Rooms

4.4

Rated 4.4 out of 5 stars

233 Reviews

Free gift - add a main filter to basket

Size: Large

Color: Midnight Blue

Powerful filtration. Advanced odor removal.

Free main filter with every order - add a main filter to your basket and enjoy cleaner air for less.
Rapidly cleans 65 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

Customise with exclusive accessories
Motion activated touchscreen display
RealTrack Technology®
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

Ship next day free
30 day home trial
Authenticity guaranteed

Customise your Blue Signature™

Pre-Filter| Nordic Fog£15.00

Blueair Blue Signature Large Pre-Filter in Nordic Fog

Wood Leg Base£54.00

Chrome Ring Base£74.00

Replacement Filter£59.00

Why choose Blue Signature™?

Doubles as a table-top & much more

Make it yours. Choose from curated pre-filter colours 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,
Advanced odour removal

HEPASilent filtration technology captures at least 99.97%² of tiny airborne pollutants down to 0.1 microns while OdourFence Technology captures common odour 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 odours 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.
Customise 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.

Ship free next day
30 day home trial
Authenticity guaranteed

Technical Specifications

Filter Type

Particle & Carbon
Dimensions(HxWxD)

44cm x 40cm x 40cm
Product Weight

6 kg
Energy Consumption

3.5-42 W
Sound level

23-55 dB
Air outlet

Side
Recommended room size

(4.8 - 2 ACH) 67 - 161 m²
Clean air delivery rate (CADR)

Pollen 773 m³/h
Dust 741 m³/h
Smoke 765 m³/h
Recommended filter change

9-12 months
Number of filters

1
Speed control options

1 - 2 - 3 - 4 - Auto - Night

FAQ

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?

4.4

Rated 4.4 out of 5 stars

Based on 233 reviews

82%would recommend these products

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233 reviews

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BA
beth a.
Verified Buyer
54 minutes ago
Reviewing
Blue Signature™ Large Nordic Fog
Rated 5 out of 5 stars
Quiet and attractive
Looks good in my house and scaled for large rooms. I don’t hear it on low. Great job!
Was this helpful?
DH
Deirdre H.
Verified Buyer
Yesterday
Reviewing
Blue Signature™ Large Nordic Fog
Rated 5 out of 5 stars
?
Love it
Was this helpful?
DH
Deirdre H.
Verified Buyer
Yesterday
Reviewing
Blue Signature™ Small Nordic Fog
Rated 5 out of 5 stars
?
Love it
Was this helpful?
ES
Elaine S.
Verified Buyer
Yesterday
Reviewing
Blue Signature™ Medium Nordic Fog
Rated 5 out of 5 stars
Blue Signature™ Medium Nordic Fog
This is working great in our home. It amazes me how light the whole air purifier is.
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MW
Matthew W.
Verified Buyer
Yesterday
Reviewing
Blue Signature™ Medium Nordic Fog
Rated 1 out of 5 stars
Blue Signature Medium
I love the product but my unit stopped working just weeks after purchase. I asked to be connected with an agent via the customer service chat on 9/7/2026 and have not heard back yet ticket #737964
Was this helpful?
BU
Blueair UK
Yesterday
Thank you for sharing your experience with us. We’re truly sorry to hear that your unit stopped working so soon after purchase and that you haven’t received a response to your support request yet. Please don’t worry, our support team will be contacting you directly regarding ticket #737964 to assist you and help resolve this issue as quickly as possible.

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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