- REPLACEMENT HUMIDIFIER FILTER: This filter is the ideal replacement for Holmes HWF-64 humidifiers, ensuring your unit operates at peak performance. - ENHANCED DURABILITY: Featuring a reinforced design, this filter is built to last, providing superior efficiency. Regular replacement every 2 months is recommended to maintain optimal humidity levels. - WIDE COMPATIBILITY: This filter works seamlessly with various Holmes models including HM-1645, HM-1730, HM-1745, HM-1746, HM-1750, HM-2200, and HM-2220. It is also compatible with Hamilton Beach models 05520, 05521 (05920), and more. - PROLONGS FILTER LIFE: The wicking design effectively captures minerals and sediments, extending the lifespan of your filter in hard water areas. - USE SCENARIOS: - Perfect for maintaining comfortable humidity levels in your home, especially during dry winter months. - Ideal for bedrooms, nurseries, or offices where dry air can cause discomfort or health issues. - Great for preserving wooden furniture and musical instruments by preventing excessive drying. Ensure your humidifier functions efficiently with this reliable replacement filter, designed for long-lasting performance and effective moisture retention.