Filter-Monster HEPA Filter Replacement Compatible with Blueair Blue Pure 311i MAX Air Purifier

The Filter Monster BA311MAX-FM1 HEPA filter replacement is designed for the Blueair Blue Pure 311i MAX Air purifier, capturing up to 99.97% of particles as small as 0.3 microns and improving indoor air quality.

• The HEPA filter material captures up to 99.97 percent of particles as small as 0.3 microns.
• It is recommended to replace the HEPA filter every nine (9) months or more often depending on air quality and environmental factors.