![Blue Pure 411i Max, 411a Max Blue Pure 411i Max, 411a Max](https://www.blueair.com/dw/image/v2/AASF_PRD/on/demandware.static/-/Sites-blueair-master-catalog/default/dwa1cac490/filters/blue/F4MAX-Filter.png?sw=900&sh=900&sm=fit)
Blue Pure 411i Max, 411a Max
Compatible with Blue Pure 411i Max • 411a Max; Not compatible with Blue Pure 411 • 411+ • 411 AutoPromotions
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![Blueair Blure pure max air purifier top opened up Blueair Blure pure max air purifier top opened up](https://www.blueair.com/dw/image/v2/AASF_PRD/on/demandware.static/-/Library-Sites-blueair-ca-content-library/default/dwcd0d089c/Blue%20Pure%20Max/Filters/Blue311iFilter-Body1Use.png?sw=468)
Designed specifically for Blue Pure 411i Max & 411a Max.
Find the name of your air purifier on the label inside your air purifier.
![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/dwb7906591/Blue%20Pure%20Max/Filters/Blue311iFilter-Body2.png?sw=468)
Blueair’s proprietary RealTrack algorithm accurately calculates the remaining filter lifetime based on fan speed, usage time and pollution levels.
![Blueair Blue pure max pre-filter replacement Blueair Blue pure max pre-filter replacement](https://www.blueair.com/dw/image/v2/AASF_PRD/on/demandware.static/-/Library-Sites-blueair-ca-content-library/default/dw0a54278d/Blue%20Pure%20Max/Filters/Blue311iFilter-Body3.png?sw=468)
This air purifier features a hassle-free filter replacement system, allowing you to easily and quickly swap out the filter without any complicated procedures.
![Blueair null Blueair null](https://www.blueair.com/dw/image/v2/AASF_PRD/on/demandware.static/-/Library-Sites-blueair-ca-content-library/default/dw095eed7e/Blue%20Pure%20Max/Filters/BlueVimeoFilterVideo.png?sw=468)
![Blueair Image Blueair Image](https://www.blueair.com/on/demandware.static/-/Library-Sites-blueair-ca-content-library/default/dw633400ac/New/Icons/icon_alexa.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 Filter Blueair Filter](https://www.blueair.com/on/demandware.static/-/Library-Sites-blueair-ca-content-library/default/dw3ef1dc59/New/Icons/icon_onebutton.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 Minimizes unhealthy allergens and germs Blueair Minimizes unhealthy allergens and germs](https://www.blueair.com/on/demandware.static/-/Library-Sites-blueair-ca-content-library/default/dw2d3e3126/New/Icons/healthier-life.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.
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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 411i Max, 411a Max Blue Pure 411i Max, 411a Max](https://www.blueair.com/dw/image/v2/AASF_PRD/on/demandware.static/-/Sites-blueair-master-catalog/default/dwa1cac490/filters/blue/F4MAX-Filter.png?sw=450&sh=450&sm=fit)
This filter is compatible only with the Blue Pure Max 411i & 411a air purifiers.
Press and hold down the LED button for 10 seconds to reset the replacement filter indicator.
Quick cleaning: Vacuum the fabric pre-filter every time you do a big cleaning at home or when you see dust building up. Vacuum the exterior of the fabric with a soft brush attachment.
Deep cleaning: Wash the fabric pre-filter every time you replace the Particle & Carbon filter, approximately every 6 months. Wash the fabric pre-filter in a washing machine according to the pre-filter’s label. Hang to dry.
Regular maintenance of your air purifier will help preserving optimal performance.
Disclaimers
¹ Comparing pollen CADR on high fan speed (Blue Pure 411a Max & 411i Max vs. Blue 411 Auto), other units may vary. Based on AHAM maximum allowable certified rating which may vary from the AHAM seal claimed valued.
² Tested on PM 2.5, pollen allergen (Cry j1), cat allergen (Def f1), fungal allergen (Alt a1), dust mite allergen (Fel d1). Performance may vary across models.
³ Tested to remove min. 99.9% of S. aureus, K. pneumoniae, P. aeruginosa, MS2, E.Coli, H1N1, A.Niger.
⁴ Tested on TVOC, sulfure dioxide, nitrogen dioxide. Deodorization tested on ammonia, acetaldehyde, acetic acid."