Pure Illusion engineers have devised an innovate process to visualize Crystalline air purification. This patent pending process demonstrates Crystalline performance validation for IQ Air Health Pro series purifiers. The Crystalline Stage 1 Prefilter fits the IQAir PreMax module. The Crystalline Stage 2 Gas & Odor Management Filter fits the IQAir V5 Cell module. The Crystalline Stage 3 HEPA Filter fits the IQAir Hyper Hepa module. When the complete set has been installed the performance results are fantastic! View the US Patent Pending Process created by PureIllusion.