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Blue Signature™ Midnight
Blue Signature™ Midnight
Blue Signature™ Midnight
Blue Signature™ Midnight
Blue Signature™ Midnight
Blue Signature™ Midnight
Blue Signature™ Midnight
Blue Signature™ Midnight
Blue Signature™ Midnight
Blue Signature™ Midnight
Blue Signature™ Midnight
Blue Signature™ Midnight
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Blue Signature™ Midnight
Blue Signature™ Midnight
Blue Signature™ Midnight
Blue Signature™ Midnight
Blue Signature™ Midnight
Blue Signature™ Midnight
Blue Signature™ Midnight
Blue Signature™ Midnight
Blue Signature™ Midnight
Blue Signature™ Midnight
Blue Signature™ Midnight
Blue Signature™ Midnight
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Blue Signature™

Air Purifier, Extra-large Rooms

4.8
Rated 4.8 out of 5 stars
4.8 Stars (189 Reviews)
Save 15%
One Time Shipment
  • 1 Air Purifier
  • 1 Particle & Carbon Filter
  • 1 Pre-Filter
Filter Subscription
  • 1 Replacement Filter
  • Save 15% on every filter
  • Pay when we send it
Customize Your Subscription
Select Filter
Choose Frequency
  • Subscribe & Save 25% off your first filter

  • Rapidly cleans 705 ft² in 12.5 minutes & up to 3,385 ft² in 1 hour
  • 7 stages of filtration removes 99.97%² of airborne particles
  • 10x³ more odor removal with OdorFence 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 Midnight and 1 Particle & Carbon filter
  • Customize with exclusive accessories
  • Motion activated touchscreen display
  • RealTrack Technology®
  • Doubles as a table-top

Why choose Blue Signature™?

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

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Smart control in the highly rated & newly upgraded Blueair app

Feel the difference with Blue Signature™

95%

felt it contributed to a
healthier living environment⁵

89%

prefer it over any
other air purifier⁵

Feel the difference with Blue Signature™

Independently proven performance

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

Blue Signature™ Midnight

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

Register your product to extend the 1-year warranty to a 3-year warranty.

4.8
Rated 4.8 out of 5 stars
Based on 189 reviews
Total 5 star reviews: 166 Total 4 star reviews: 13 Total 3 star reviews: 5 Total 2 star reviews: 3 Total 1 star reviews: 2
95%would recommend these products
189 reviews
  • BY
    BRENT Y.
    Verified Buyer
    2 days ago
    Reviewing
    Blue Signature™ Nordic Fog
    Rated 5 out of 5 stars
    Perfect

    Small but powerful unit. It just works, really nothing else to say. All my air purifiers are Blue Aire. I have not tried anyone else and just being don't see a need to try anyone else. No gimmicks, no smoke filled chambers, these work. I owned 10 of them. Enough said.

  • PL
    Paul L.
    Verified Buyer
    4 days ago
    Reviewing
    Blue Signature™ Nordic Fog
    Rated 5 out of 5 stars
    Precious clean air

    Totally enjoying the Blue Air. Although we usually have a clean air indicator it picks up something and gets to work.

  • NT
    Nancy T.
    Verified Buyer
    5 days ago
    Reviewing
    Blue Signature™ Nordic Fog
    Rated 5 out of 5 stars
    Love it

    Looks like it doing its job . I’ll know better in about three months

  • MD
    Micah D.
    Verified Buyer
    4 weeks ago
    Reviewing
    Blue Signature™ Nordic Fog
    Rated 5 out of 5 stars
    Blueair Sognature

    I’ve been real happy with the results from my new air purifier. I have dogs in the house and a lot of dust. There has been a notable difference in air quality in the first week.

  • CH
    Cynthia H. A.
    Verified Buyer
    1 month ago
    Reviewing
    Blue Signature™ Midnight
    Rated 5 out of 5 stars
    amazing

    these filters are amazing, I have one in every room and the difference is incredible

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+