![Blueair Diagram showing which air purifier model should be used for the filter Blueair Diagram showing which air purifier model should be used for the filter](https://www.blueair.com/dw/image/v2/AASF_PRD/on/demandware.static/-/Library-Sites-blueair-us-content-library/default/dw9590a34c/Filter%20PDPs%20-%202023/AllergenBlock/211Series-Body1.png?sw=468)
Is this filter right for you?
This filter is compatible with the Blue Pure 211+ air purifier (non-auto) and the Blue Pure 211+ Auto.
You can identify whether your air purifier is the standard 211+ non-auto version, if it has a button on the front of the air purifier. The 211+ Auto only has an LED light on the front.
![Blueair Internal diagram showing what is being filtered Blueair Internal diagram showing what is being filtered](https://www.blueair.com/on/demandware.static/-/Library-Sites-blueair-us-content-library/default/dwbb9871ba/Filter%20PDPs%20-%202023/AllergenBlock/211Series-Body2.png)
Extra protection against allergens
Blueair's AllergenBlock¹ technology reduces your exposure to pollen, pet dander and dust allergens, by neutralizing over 90%² of their sneeze-inducing properties once caught on the filter.
![Blueair Main filter Blueair Main filter](https://www.blueair.com/on/demandware.static/-/Library-Sites-blueair-us-content-library/default/dw92bc7ed5/Filter%20PDPs%20-%202023/AllergenBlock/AllergenFilter-3Column-1.png)
Captures airborne particles, including pollen, dust and pet dander allergens
![Blueair AllergenBlock defense Blueair AllergenBlock defense](https://www.blueair.com/on/demandware.static/-/Library-Sites-blueair-us-content-library/default/dw49bc8329/Filter%20PDPs%20-%202023/AllergenBlock/AllergenFilter-3Column-2.png)
Neutralizes² over 90% of the allergen properties that can trigger discomfort
![Blueair Activated carbon Blueair Activated carbon](https://www.blueair.com/on/demandware.static/-/Library-Sites-blueair-us-content-library/default/dwcd3345d0/Filter%20PDPs%20-%202023/AllergenBlock/AllergenFilter-3Column-3.png)
Traps light household odors from pets, cooking and smoking
![Blueair Person replacing Blueair filter Blueair Person replacing Blueair filter](https://www.blueair.com/dw/image/v2/AASF_PRD/on/demandware.static/-/Library-Sites-blueair-us-content-library/default/dw0cbab638/Filter%20PDPs%20-%202023/AllergenBlock/211Series-Body3.png?sw=468)
Dirty filters clean the air less effectively
We recommend replacing your air purifier filter about every 6 months when used 24 hours a day.
![Blueair AllergenBlock genuine Blueair filter Blueair AllergenBlock genuine Blueair filter](https://www.blueair.com/on/demandware.static/-/Library-Sites-blueair-us-content-library/default/dw4454fffb/Filter%20PDPs%20-%202023/AllergenBlock/211Series-Body4.png)
Genuine Blueair replacement filter
Protect your air purifier from damage caused by unofficial filters.
![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-us-content-library/default/dw3d4a9a05/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- 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-us-content-library/default/dw1c67965c/New/Icons/New%20Icons%20July%2020/6%20month%20filter%20change%20icon.png)
To maintain optimal 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.
![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-us-content-library/default/dwe8472f2d/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.
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Filter TypePolypropylene fibers free of chemicals and binders with activated carbon mesh. Naturally anti-bacterial. Fiber shedding resistant.
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Dimensions(HxWxD)12.1 x 20.7 x 3.1 in
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Product weight9.5lbs
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Recommended filter change6 months (4,380 hours)
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Number of filters1
![Blue Pure 211+ Series 360 View](https://www.blueair.com/dw/image/v2/AASF_PRD/on/demandware.static/-/Sites-blueair-master-catalog/default/dwebd69b38/filters/blue/AllergenBlock/AllergenBlock 211 Series.png?sw=600&sh=600&sm=fit)
This filter is compatible with the Blue Pure 211+ Auto & Blue Pure 211+.
Purchasing a filter subscription saves you 15% on all future replacement filter orders + free shipping. 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.
1 AllergenBlock refers to inanimate allergens (e.g., pollen, dust and pet dander)
2 deactivation testing of pollen (Cry J1), pet dander (Fel d1 & Can f1) and dust mite matter (Der f1) on the filter media in 60 mins.
3 A 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.