Cleaner air starts with a fresh filter

Works with HEPASilent™ Technology to remove up to 99.97% of tiny airborne particles while carbon filtration.

Simple upkeep, every six months

A filter replacement indicator lets you know when it’s time for a fresh filter, typically after about six months of use.

4.3

Rated 4.3 out of 5 stars

4.3 Stars (96 Reviews)

Blue Pure 121 Filter

Particle + Carbon

Keep your air purifier performing at its best with Particle + Carbon filtration designed to capture everyday airborne pollutants & household odors.

Designed for

Blue Pure 121

Great for

Dust, pollen, pet dander, smoke & everyday household odors

Filter Subscription

1 Replacement Filter
Delivered Every 6 Months
Pay when we send it
Save 15% on recurring filter replacements

Most Popular

Free & fast shipping
30 day home trial
Free extended warranty

Why you’ll love it

Reliable everyday filtration that makes keeping your air purifier performing its best simple.

Captures dust, pollen & pet dander
Helps filter PM2.5 and other airborne particles
Helps reduce light cooking and smoke odors
Replace about every 6 months
Filter indicator reminds you when it’s time to change

6 month filter lifetime
Particle + odor filtration
App replacement alerts
Quick & easy filter changes

Features & Technologies

Particle + Carbon filtration tackles everyday particles and light household odors.
Main filter captures PM2.5, pollen, dust mite matter and pet dander allergens.
Activated carbon traps light odors from smoke, cooking and more.
6-month replacement cycle keeps routine maintenance straightforward.
Filter replacement indicator lets you know when it’s time for a fresh filter.
Easy replacement design makes routine filter changes simple.

Cleaner air starts with a fresh filter

Works with HEPASilent™ Technology to remove up to 99.97% of tiny airborne particles while carbon filtration.

Simple upkeep, every six months

A filter replacement indicator lets you know when it’s time for a fresh filter, typically after about six months of use.

Smart filtration, you can trust

Is this the right filter for you?

Find the Blueair model name on the label inside your air purifier.
Accurate filter lifetime tracking

RealTrack Technology tracks your filter lifetime based on pollutant levels and alerts you when it’s time to replace your filter.
Subscribe & Save 15%

Dirty filters clean the air less efficiently. Sign up for a filter subscription and get fresh filters delivered right when you need them.

Main Filter

Captures airborne particles including, PM 2.5, pollen, dust mite matter allergen & pet dander allergen

Activated Carbon

Traps light household odors from smoke, cooking odors and more

FAQ

What Blueair air purifier is compatible with this filter?

This filter is compatible with the Blue Pure 121 air purifier.

How do I reset my filter replacement indicator (red light) on my Blue Pure air purifier?

A red filter replacement indicator appears on the air purifier when it is time to change filter, after about 6 months of operation.

After you replace your filter, press the center button down to reset the filter light indicator until the red light disappears. It usually takes 7-10 seconds and may take up to 30 seconds depending on the model.

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Blue Pure 121 Particle + Carbon Filter

Is this the right filter for you?

Accurate filter lifetime tracking

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