💧 Elevate Your Air, Elevate Your Life! Genuine Aprilaire parts ensure longevity and effectiveness. No more hunting for parts; everything you need is in one kit. Transform your home into a sanctuary with peak humidifier performance. Maintain 40%-60% humidity to reduce respiratory issues and allergens. Designed specifically for models 600, 600A, 600M for seamless integration. Whole-home solution Optimal humidity control Complete maintenance kit The AprilAire 4839 Humidifier Maintenance Kit is a comprehensive solution designed to optimize the performance of your AprilAire Whole Home Humidifier models 600, 600A, and 600M. This kit includes all necessary components for maintenance, ensuring your humidifier operates at peak efficiency while promoting a healthier indoor environment.