NASA Talent: Product development is led by a former NASA engineer; Brainpower with a history in space, making life better here at home Ultimate Filtration: Includes Genuine Crystalline Ultra Premium Stage 2 Gas & Odor Management Filter; easy-to-follow illustrated installation instructions; thank you card and complimentary product support No Compromises: Crystalline High-Quality Activated Carbon provides chemical adsorption of airborne contaminants and impurities with unrestricted airflow in compatible Health Pro series air purifiers Scientific Validation: Using TSI-8130 according to EN1822-3 standards to ensure proper performance; Watch our "What About Particle Size?" video for detailed information Ultimate Compatibility: Manufactured to strict tolerances; Crystalline Stages F1, F2, and F3 are compatible with IQAir PreMax Module, IQAir V5 Cell Module, and IQ Air Hyper Hepa Module respectively Independent Testing: SGS performed independent testing on PureIllusion Crystalline Filtration material on October 31, 2023 (See Product guides and documents, Certificate of Analysis) Meet the Crystalline Stage 2 Ultra Premium Gas & Odor Management Filter... A scientifically tested boutique filter replacement designed and manufactured by PureIllusion. Crystalline Stage 2 is a tailor-made compatible direct-fit iq air filter replacement designed for the V5-Cell Module of iqair healthpro plus air purifier systems, which include the HealthPro and HealthPro Plus air purification systems. PureIllusion never compromises when it comes to fresh clean crisp-smelling air. We have gone to great lengths to manufacture a direct-fit filtration line for the Health Pro V5 Cell Module. When installed in your filtration system you will notice a Crystalline Stage 2 filter has the same precise fit as the original equipment filter. To ensure high quality filtration PureIllusion tapped a former NASA Engineer to lead Crystalline product development. The product line has been scientifically tested to ensure proper filtration (see product images). The Health Pro Plus air purifier comes standard with a Gas & Odor Management filter. The HealthPro is able to accept a Gas & Odor Management Filter thereby upgrading its functionality to a HealthPro Plus. A Crystalline Gas & Odor Management filter is used to remove unpleasant odors so you can enjoy crisp clean pleasant smelling air. Upgrade your filters to PureIllusion Crystalline today for Ultra Premium Filtration!!!