It is critical for technicians to verify the part number compatibility against the water heater rating plate

Is the 735001628 compatible with non-HVAC systems

Engineered for precision combustion control

internal wiring harnesses

25" diameter fit for standard HVAC blower bearings

Aprilaire 4640 Scale Control Insert 324846-701 It is critical for techniciansMaintaining your whole home humidification system requires precision engineered components like the Aprilaire 4640 Scale Control Insert. This genuine Aprilaire replacement part is specifically designed to encase the humidifier water panel, serving as a structural U shaped insert that guides water flow and manages mineral accumulation. Constructed from durable, heat resistant polypropylene, the 4640 insert effectively captures heavy scale buildup and