Smith Vertex or Lochinvar Knight units

This specific model is rated for 0' to 1999'

as well as associated condensate controllers and liquid drainers

This HVAC contactor 120V coil is designed for a direct fit in the electrical panel

Aprilaire 4217 Scale Insert 340793-762 Smith Vertex or Lochinvar KnightThe Aprilaire 4217 Scale Insert is a critical humidifier replacement part engineered to maintain the peak performance of your whole house humidification system. This plastic, U shaped scale control insert serves as a protective housing for the Aprilaire 10 water panel, ensuring that mineral deposits and scale accumulation are directed back into the evaporative pad rather than damaging the humidifier cabinet. Specifically designed for Aprilaire