H13 True HEPA Replacement Filter Compatible with Blueair Blue Signature SP4i Air Purifier for Large Rooms & Home up to 3385 ft², Model Number BLU-11293-PARENT, 1 Pack

["【Compatible Model】Perfectly compatible with Blueair Blue Signature SP4i Air Purifier for Large Rooms & Home up to 3385 ft²","【H13 True HEPA】Adopt H13 medical grade true HEPA to efficiently absorb most of fine particle from the air","【Odor Filter】The activated carbon filter layer helps to absorb wanted household odors such as cooing odor,pet odor, smoake and VOCs","【Hook-and-loop fastener design】The connection point utilizes a hook-and-loop fastener design for enhanced ease of use and reduced operational costs","【Replacement Tip】It is recommended to replace the filter every 6-12 months depending on using frequency"]