| Genuine Aprilaire 4526 Duct Panel For Integral Damper |
 Integral damper duct panel for Aprilaire 550 humidifier. Related Products: Aprilaire 4040 24 Volt Solenoid Valve Aprilaire 10 Water Panel Aprilaire 500A Humidifier w/ Digital Automatic Humidistat Price: 54.99 |