![F5MAX AllergenBlock Replacement Filter for 511i Max F5MAX AllergenBlock Replacement Filter for 511i Max](https://www.blueair.com/dw/image/v2/AASF_PRD/on/demandware.static/-/Sites-blueair-master-catalog/default/dw35d2680b/filters/blue/Max/Replacement%20Max/AllergenBlock/511i_allergen.png?sw=900&sh=900&sm=fit)
F5MAX AllergenBlock Replacement Filter for 511i Max
Compatible with Blue Pure 511i MaxAdd to cart options
![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-ca-content-library/default/dw667908f1/2024%20-%20Filter%20PDPs/Inside_411iMax.png?sw=468)
replacement filter
Designed specifically for the Blue Pure 511i Max.
Find the name of your air purifier on the label inside your air purifier.
![Blueair Blueair AllergenBlock reduces exposure to allergens Blueair Blueair AllergenBlock reduces exposure to allergens](https://www.blueair.com/dw/image/v2/AASF_PRD/on/demandware.static/-/Library-Sites-blueair-ca-content-library/default/dw62dcf2a3/2024%20-%20Filter%20PDPs/AllergenBlock%20Tech.png?sw=468)
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-ca-content-library/default/dwce86c25c/2024%20-%20Filter%20PDPs/AllergenBlock-Filter.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-ca-content-library/default/dw8ce63656/2024%20-%20Filter%20PDPs/Allergen.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-ca-content-library/default/dw7ea5499f/2024%20-%20Filter%20PDPs/Carbon.png)
Traps light household odors from pets, cooking and smoking
![Blueair Blueair RealTrack Technology Blueair Blueair RealTrack Technology](https://www.blueair.com/dw/image/v2/AASF_PRD/on/demandware.static/-/Library-Sites-blueair-ca-content-library/default/dw628a496e/2024%20-%20Filter%20PDPs/F4MAX_filter%20status.png?sw=468)
lifetime status
Blueair's proprietary RealTrack algorithm accurately calculates the remaining filter lifetime based on fan speed, usage time, and pollution levels.
![Blueair Blueair genuine filter Blueair Blueair genuine filter](https://www.blueair.com/dw/image/v2/AASF_PRD/on/demandware.static/-/Library-Sites-blueair-ca-content-library/default/dw36818865/2024%20-%20Filter%20PDPs/Genuine%20Filter.png?sw=468)
replacement filter
Protect your air purifier from damage
caused by unofficial filters.
![Blueair Image Blueair Image](https://www.blueair.com/on/demandware.static/-/Library-Sites-blueair-ca-content-library/default/dw00ec6c28/2023%20Icons/Icon_Bacteria.png)
With the unique filter design at least 99.97%³ of airborne particles, even down to 0.1 microns, are removed, while using less energy and producing less noise.
![Blueair Works 24/7, for six months straight Blueair Works 24/7, for six months straight](https://www.blueair.com/on/demandware.static/-/Library-Sites-blueair-ca-content-library/default/dw3ef1dc59/New/Icons/icon_onebutton.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 Keeps clean air flowing, resists clogging Blueair Keeps clean air flowing, resists clogging](https://www.blueair.com/on/demandware.static/-/Library-Sites-blueair-ca-content-library/default/dw478ffea1/2023%20Icons/Icon_Dust.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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Recommended filter change6 months (4,380 hours) when used 24 hours a day
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Number of filters1
![F5MAX AllergenBlock Replacement Filter for 511i Max F5MAX AllergenBlock Replacement Filter for 511i Max](https://www.blueair.com/dw/image/v2/AASF_PRD/on/demandware.static/-/Sites-blueair-master-catalog/default/dw35d2680b/filters/blue/Max/Replacement%20Max/AllergenBlock/511i_allergen.png?sw=450&sh=450&sm=fit)
This filter is compatible only with the Blue Pure 511i Max air purifier.
Press and hold down the LED button for 15 seconds to reset the replacement filter indicator.
Disclaimers
¹ AllergenBlock refers to inanimate allergens pollen, dust and pet dander.
² Based on ELISA deactivation testing of Pollen (Cry J1), Pet Dander (Fel d1, Can F1), Dust Mite Matter (Der f1) on the filter media in 60 minutes.