Aprilaire 300 Humidifier Maintenance Kit with #35 Water Panel AMKit4793 NEW Aprilaire Model 300 humidifier maintenance kit includes a replacement water panel and necessary installation components. Designed specifically for the Model 300, this kit ensures your whole-home humidifier continues to operate at peak efficiency by providing a fresh evaporation surface. The package includes the #35 water panel housed in a sturdy black frame, along with a distribution tray, connection tubing, and a small parts wet pack for a complete tune-up. Regular replacement of these components helps maintain indoor humidity levels and prevents mineral buildup. Measurements: • Water Panel Frame: 10" x 13" • Tubing Length: 24" (approximate) #Nylon