[Perfect compatible]: These filter have the same specification with original filter, replacement filters compatible with Blueair 121 Air Purifier to maintain superior performance over time and ensures your warranty remains intact.
[Technology Innovation]: New activated carbon distribution technology, compared to carbon particles and carbon network distribution is more uniform, Absorbs household odors and fumes, more quickly and effectively.
[Superior performance]: 121 replacement filter removes as well as 99. 97% as small as 0. 1 μm of airborne particles, like pollen, dust and pet dander.
[Easy to use]: Filter structure traps even the smallest particles and resists clogging to maintain maximum airflow. Our unique HEPA filtration technology allows our filters to be less dense, resulting in quieter and more energy efficient air purifiers.
[Warranty]: We are committed to customer satisfaction, if you encounter any problems during use, please feel free to contact us, we will definitely give you a satisfactory answer within 24 hours.
