F3MAX+ Replacement Filter For 311i+ MaxCompatible with 311i+ Max
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Find the name of your air purifier on the label inside your air purifier.
Blueair’s proprietary RealTrack algorithm accurately calculates the remaining filter lifetime based on fan speed, usage time and pollution levels.
This air purifier features a hassle-free filter replacement system, allowing you to easily and quickly swap out the filter without any complicated procedures.
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 more quietly while using less energy.
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.
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.
Accurate lifetime calculated using RealTrack. When the filter needs changing, the filter replacement LED will light up on the interface and the Blueair app will send you an alert.*Don't forget to save with our subscription program.
Recommended filter change6 months (4,380 hours) when used 24 hours a day
Number of filters1
This filter is compatible only with the Blue Pure Max 311i air purifier.
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.
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."