For individuals with allergies or asthma, HEPA (High-Efficiency Particulate Air) purifiers are recommended. These purifiers use HEPA filters to trap airborne particles like pollen, pet dander, dust mites, and mold spores, which can trigger allergies and asthma symptoms. Additionally, look for purifiers with activated carbon filters to remove odors and VOCs (volatile organic compounds) from the air. Choosing a purifier with a CADR (Clean Air Delivery Rate) suitable for your room size ensures effective air purification. Regular filter replacement is essential for optimal performance.