Description
Restore reliable humidifier performance with the Aprilaire 4981 Internal Control Circuit Board—a direct-fit replacement designed for Aprilaire 800 and 865 steam humidifier models manufactured before November 2014. Built in the USA, this essential replacement board ensures precise humidity control and dependable operation.
Specifications:
- Product Length: 5.5 inches (13.970 cm)
- Product Width: 2.8 inches (7.112 cm)
- Product Height: 0.85 inches (2.159 cm)
- Product Weight: 0.245 lbs (0.111 kg)











