Blueair - Blue Pure 411 Replacement Filter for 411 Auto, 411 & 411+ Purifiers, HEPASilent Filtration, Carbon Odor Control - Black/White

Thank you for your question! The correct replacement filter for the Blue Pure 511i Max is the F5MAX Replacement Filter. You can purchase it here: https://www.bestbuy.com/product/blueair-genuine-replacement-filter-for-blue-pure-511i-max-air-purifier-white/JX95HCYTQJ

Thank you for your question! The Blue Pure 411i Max air purifier uses the F4MAX Replacement Filter. If you have additional questions, please don't hesitate to contact us here: https://www.blueair.com/us/contact-us-page.html

Hi Jo! Thank you for your interest! Blueair air purifiers are designed in Sweden and manufactured in China.

Blueair filters are not HEPA. Our air purifiers use a unique combination of electrostatic and mechanical filtration that we like to call HEPASilent™ technology. We use the term to describe our filtration technology as a whole, where others use the HEPA term to specify the filter type. The combination of electrostatic and mechanical filtration results in performance equal in efficiency to the True HEPA standard, capturing at least 99.97% of airborne particles down to 0.1 microns in size. Our filters are less dense than traditional HEPA filters, requiring less air pressure — making quieter and more energy efficient air purifiers.

This filter is compatible with Blue Pure 411, 411+, MINI, and 411 Auto air purifier models.