but the 421-557 is chassis-specific

this specific assembly is calibrated for LP gas systems (Propane)

Durability: Constructed with high-grade copper and brass to withstand thermal shock and vibration typical in HVAC reversing valve applications

Features a full port design for unrestricted flow

Durable Infrastructure: Non-bleed design with an integrated check valve

York S1-026-45716-000 Fan Blade Els PW 29614 but the 421-557 is chassis-specificThe York S1 026 45716 000 Fan Blade is a precision engineered OEM replacement fan blade designed for high efficiency condensing units. Featuring a 24 inch diameter and a specific 24 degree pitch, this component is optimized to move maximum CFM while maintaining low auditory output. As a veteran grade HVAC condenser fan blade, it utilizes a 3 blade configuration with a clockwise (CW) rotation to ensure proper heat dissipation across the coils. The 1 2"