The best types of air purifiers for indoor air quality include HEPA filters, activated carbon filters, and UV-C light purifiers. HEPA filters are highly effective at capturing particles as small as 0.3 microns, such as dust, pollen, and pet dander. Activated carbon filters excel at removing odors, chemicals, and VOCs (volatile organic compounds). UV-C light purifiers can kill bacteria, viruses, and mold spores. Combining these technologies in a single unit provides comprehensive air purification for improved indoor air quality.