Aprilaire 50 Relay 320788-703 The York S1-373-39477-002 Kit is

The York S1-373-39477-002 Kit is a heavy-duty 3-Cell Burner Wrapper Box designed specifically for 33-inch chassis residential gas furnaces

The Conbraco 36C-104-01 is a high-capacity water pressure reducing valve engineered for precision fluid control in residential and commercial plumbing systems

this orifice is precision-machined to regulate vent airflow

The Modine 5H0755250000 Motor is a high-performance 115V 1/30HP induction motor engineered specifically for technical compatibility within Modine HVAC unit heaters

Advanced Protection: The fabric-reinforced molded diaphragm isolates the spring chamber from water for increased reliability

Aprilaire 50 Relay 320788-703 The York S1-373-39477-002 Kit isOptimize your home climate control system with the Aprilaire 50 Relay, a high performance current sensing relay designed specifically for 24V HVAC applications. This essential component ensures your whole house humidifier operates only when the furnace blower is active, preventing wasted water and protecting sensitive electronics from electrical feedback. By detecting the furnace blower motor current, the Aprilaire 50 automates the humidification