The GWN series is designed for general purpose commercial gas detection and ventilation control

ensuring compatibility with standard inducer fan hubs

The Advanced Distributor Products 76708800 Gasket is a high-performance induced draft gasket engineered specifically for critical sealing in residential and commercial heating systems

installing a fresh power cord strain relief is standard practice to prevent water ingress at the entry point

LH33ZS001A

Aprilaire 4407 Water Distribution Tray 318423-701 The GWN series is designedThe Aprilaire 4407 Water Distribution Tray is a critical component for maintaining the efficiency of your whole house humidifier. Specifically engineered for the Aprilaire Model 400 series, this OEM replacement part ensures that water is evenly dispersed across the evaporative capacity of the water panel. Featuring a specialized pumice coating, the tray prevents water from "beading" and instead facilitates a uniform flow, which is essential for