the 918-0001-03 is specifically designed for 2D

Johnson Controls T22JCC-1 Line Voltage Wall Thermostat

the D4S is specifically rated for low-flow duct detection

Engineered for compatibility with brass body valves

and alarm modes

York S1-026-25529-701 Blower Wheel THPU32HP7Y the 918-0001-03 is specifically designedThe York S1 026 25529 701 Blower Wheel is a high performance OEM replacement centrifugal fan wheel designed for precise airflow management in residential and commercial York air handlers and furnaces. Engineering for a 12 x 12 inch configuration, this double inlet wheel features a 1 inch bore and is specifically balanced for counter clockwise (CCW) rotation. It serves as the direct, drop in successor to the S1 026 25529 001, ensuring a perfect fit