![Blueair Image Blueair Image](https://www.blueair.com/on/demandware.static/-/Library-Sites-blueair-ca-content-library/default/dw4247c383/UIUX2021/PLP/PLP-Air%20Purifiers-%20HEASIlent%20callout.png)
![Blueair Image of inside of 121 particvle and carbon filter with genuine Filter icon Blueair Image of inside of 121 particvle and carbon filter with genuine Filter icon](https://www.blueair.com/dw/image/v2/AASF_PRD/on/demandware.static/-/Library-Sites-blueair-ca-content-library/default/dw2154f122/UIUX2021/PDPs/Blue%20Filters/121%20Filter/Blueair-FilterPDP-Secondary02-BP121Particle+%20Carbon-0122-dsk.png?sw=468)
Look-a-likes don't stand a chance
Genuine Blueair filters are specifically designed to enable more air flow through the filter media. When combined with electrostatic filtration this results in faster cleaning than traditional HEPA filtration.
Using genuine Blueair filters ensures that your purifier continues to work effectively — so your clean air, and your warranty, remain intact.
![Blueair Image Blueair Image](https://www.blueair.com/dw/image/v2/AASF_PRD/on/demandware.static/-/Library-Sites-blueair-ca-content-library/default/dwc8583037/UIUX2021/PDPs/Blue%20Filters/Blue%20Pure%20211+/Blueair-FilterPDP-Secondary03-BP211+%20Particle+%20Carbon-0122-dsk.png?sw=468)
Keep your filter fresh and pollutants at bay
We recommend replacing your air purifier filter about every 6 months (when used 24 hours a day). That's because, just like a vacuum cleaner, over time air purifier filters can get clogged with pollutants, and even let unpleasant odors back into the room.
It's simple to replace in just a few quick steps, and easy to save with our filter subscription program.
![Blueair icon- less noise and energy Blueair icon- less noise and energy](https://www.blueair.com/on/demandware.static/-/Library-Sites-blueair-ca-content-library/default/dw9ce64700/New/Icons/New%20Icons%20July%2020/icon_lessdense_halfsize.png)
Our unique HEPASilent™ filtration technology allows this filter to be less dense, meaning it requires less air pressure. With it installed, your air purifier will operate quieter while using less energy.
![Blueair icon for Minimizes unhealthy allergens and germs Blueair icon for Minimizes unhealthy allergens and germs](https://www.blueair.com/on/demandware.static/-/Library-Sites-blueair-ca-content-library/default/dw860d50ce/New/Icons/New%20Icons%20July%2020/icon_trapsparticles_halfsize.png)
The particle filter layer helps to minimize the airborne particles that can trigger allergy symptoms, including pollen, dust, mold spores, pet dander, viruses, bacteria, and fine smoke particles.
![Blueair icon- Keeps clean air flowing, resists clogging Blueair icon- Keeps clean air flowing, resists clogging](https://www.blueair.com/on/demandware.static/-/Library-Sites-blueair-ca-content-library/default/dw264790e1/New/Icons/New%20Icons%20July%2020/icon_5airchanges_halfsize.png)
This filter's unique structure is designed to filter high volumes of air while trapping even the smallest particles. It maintains maximum airflow because it's engineered to resist clogging.
![Blueair icon - Easy, earth friendly disposal Blueair icon - Easy, earth friendly disposal](https://www.blueair.com/on/demandware.static/-/Library-Sites-blueair-ca-content-library/default/dw3853c5a2/New/Icons/New%20Icons%20July%2020/leaf%20icon.png)
Once made, the only thing this fully recyclable filter adds back to the environment is clean air. Check your local recycling facilities for availability and further guidance.
![Blueair icon- Works 24/7, for six months straight Blueair icon- Works 24/7, for six months straight](https://www.blueair.com/on/demandware.static/-/Library-Sites-blueair-ca-content-library/default/dwccbf602d/New/Icons/New%20Icons%20July%2020/6%20month%20filter%20change%20icon.png)
To maintain optimum performance, we recommend changing your filter about once every 6-months when used 24 hours a day. Don't forget to save with our subscription program.
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Filter TypeParticle filter + Carbon sheet. Activated coconut shell carbon. Non-woven Polypropelyne fibers. Free of chemicals and binders. Fiber shedding resistance.
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Dimensions(HxWxD)20.1 x 20.7 x 3.1 in in
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Product weight8lbs
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Filter frame materialABS
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Recommended filter change6 months (4,380 hours) when used 24 hours a day
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Number of filters1
![Blue Pure 121 Blue Pure 121](https://www.blueair.com/dw/image/v2/AASF_PRD/on/demandware.static/-/Sites-blueair-master-catalog/default/dw54440366/filters/blue/121-Filter.png?sw=450&sh=450&sm=fit)
This filter is compatible with the Blue Pure 121 model.
Purchasing a filter subscription saves you 15% on all future replacement filter orders + free shipping and extends your limited 1-year product warranty to an extended warranty for as long as you remain a subscriber. At the time of purchase, the subscription will automatically schedule filter deliveries at the recommended six months. You can always adjust this timeframe from the 'My Account' section.
¹A flat shipping rate of $25.00 will be charged on filter shipments to Alaska and Hawaii. Additional charges may apply for shipments over 30 lbs.