Blueair Sense Replacement Filter, Particle and Activated Carbon for Pollen, Mold, Dust, Odors, and VOC Removal, Genuine Blueair Filter Compatible with Sense+ and Sense Air Purifiers It is important to only use genuine Blueair replacement filters to maintain optimal performance and warranty. Filters that are not Blueair genuine will void your units warranty. Genuine Blueair Replacement Filter is compatible with Blueair Sense+ Air Purifier and Blueair Sense Air Purifier Particle and activated carbon filter reduces pollen, dust, pet dander, mold spores, bacteria, odor, VOCs, Tobacco smoke and other gaseous pollutants. Recommended to change filter once every 6 months, or dependent on usage. This filter can be recycled after it's changed. The Sense+ air purifiers use 2 separate filters, this replacement pack contains a pack of 2 filters. Energy saving Blueair air filters save energy due to a low-density design and requiring less pressure to push air through the filters. The filters are also 100% recyclable, so the only thing youre adding back into the environment is clean air.