Compatibility The LV-H128 replacement filter is perfectly compatible with LEVOIT LV-H128, PUURVSAS (HM669A), and ROVACS (RV60) air purifiers. Replace Part # LV-H128-RF. 3-Stage Filtration The LV-H128 replacement filter uses a three-stage design. The first pre-filter layer captures large particles such as pet hair and fur. The second stage is an H13 HEPA filter that reduces 99.97% of dust, PM2.5 and dirt in the air. The third layer is activated carbon which filters odors, helping create a cleaner and more comfortable environment for your family. Replacement Cycle Using this filter can improve the efficiency of your air purifier and help maintain fresh air in the room. It is recommended to replace the LV-H128 H13 filter every 6 months. Easy Installation Get fresh air in a few steps: 1. Remove the filter cover 2. Unwrap the LV-H128 filter 3. Place the filter into the air purifier 4. Replace the filter cover Use Scenarios - Homes with pets to reduce pet hair and dander and improve overall air quality - Urban or high-dust environments to lower airborne dust and PM2.5 levels - Kitchens or areas with odors to remove smells and improve indoor air freshness