Our smallest, smartest air purifier

Powerful filtration & smart features that adjusts for you

Quiet comfort day & night

Keeps clean air flowing without disrupting you & your space

4.5

Rated 4.5 out of 5 stars

4.5 Stars (320 Reviews)

Blue Signature™ Small

Name: Blue Signature™ Small Nordic Fog
Brand: Blueair
Price: 179.99 USD
Availability: InStock
Rating: 4.5 (320 reviews)

HEPASilent™ air purifier for small rooms and bedrooms with fast cleaning and powerful odor removal

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Great for

Odors, allergens, dust

Designed for

Bedrooms, apartments, nurseries

Size: Small

Color: Nordic Fog

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

Skip, Pause, or Cancel Anytime

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 248 ft² in 12.5 minutes & up to 1,190 ft² in 1 hour
Freshens bedrooms and smaller spaces fast
Runs quietly for better sleep and focus
Fits easily into smaller spaces without sacrificing performance
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

What’s in the box

Additional Features

Dimensions(HxWxD) 13.7” x 9.4” x 9.4”
Product Weight 5.64 lbs
Energy Consumption 20 W Max
Sound Level Low: 19 dB High: 50 dB
Air Outlet Top
Recommended Room Size 248 ft²
Number Of Filters 1

Our smallest, smartest air purifier

Powerful filtration & smart features that adjusts for you

Quiet comfort day & night

Keeps clean air flowing without disrupting you & your space

7 stages of superior filtration and smart VOC sensing for 10x³ more odor removal

Smart VOC sensing continuously detects airborne gases and chemical pollutants in real time. HEPASilent filtration technology captures at least 99.97%² of tiny airborne pollutants down to 0.1 microns, such as fine particles, dust mite allergen, pollen, bacteria, virus and mold allergen⁴ OdorFence captures common odor gases and breaks them down. It’s deep, effortless clean air you can feel, and smell, every day.

“Better air helps me sleep, recover, and show up at my best–whether I'm stepping onto the court or spending time with my family. That's why I'm excited to partner with Blueair.”

Josh Hart, NBA NY Knicks Guard & Blueair Ambassador

“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.”

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.

Technical Specifications

Dimensions(HxWxD)

13.7” x 9.4” x 9.4”
Product Weight

5.64 lbs
Energy Consumption

20 W Max
Sound level

Low: 19 dB High: 50 dB
Air outlet

Top
Recommended room size

248 ft²
Air changes per hour (ACH)

4.8
Clean air delivery rate (CADR)

Pollen 179 cfm
Dust 167 cfm
Smoke 160 cfm
Number of filters

1
Speed control options

1 - 2 - 3 - 4 - Auto - Night - Eco

FAQ

What is the warranty for Blue Signature™?

How often do I need to change the filter?

Your 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
18 hours 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
6 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
1 week ago
Reviewing
Blue Signature™ Small Midnight
Rated 5 out of 5 stars
good
very good
Was this helpful?
ET
Elizabeth T.
Verified Buyer
1 week 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?

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

²Tested on PM2.5 up to 90 minutes.

³Tested on Acetaldehyde gas vs. similar leading competitor filter

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

⁶Compared to Blue Pure 211+

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