York S1-373-19801-403 Burner Assembly 318973-401 This after-filter is designed for

This after-filter is designed for use in 16x25 and 20x25 White-Rodgers electronic air cleaners

while the clockwise (CW) rotation ensures correct airflow direction for heat rejection

and ball valves in demanding commercial HVACR environments

If your system requires a separate flame sensor (such as 5H0719450000)

Does this model include auxiliary contacts

York S1-373-19801-403 Burner Assembly 318973-401 This after-filter is designed forThe York S1 373 19801 403 Burner Assembly is a precision engineered OEM replacement part designed for high performance combustion in gas furnaces. This gas furnace burner assembly is constructed from durable stainless steel, ensuring it can withstand the thermal stresses of repeated firing cycles without warping or premature oxidation. As a critical Source1 burner upgrade, this assembly often comes with the igniter and flame sensor factory installed,