Does my unit require one or two prefilters

OEM Precision: Guaranteed electrical compatibility with Marley Engineered Products heating units

Industrial Build Quality: 120V AC operation with a low 6-watt power consumption minimizes energy draw while maximizing magnetic flux

often used in conjunction with potential relays to drop out of the circuit once the motor reaches approximately 75% of its rated speed

York S1-373-20717-001 Inducer Assembly Freon Does my unit require oneThe York S1 373 20717 001 Inducer Assembly is a high performance furnace draft inducer motor engineered for precise flue gas evacuation in residential heating systems. Operating at 115Vac and a fixed 3450 RPM, this single stage inducer replacement is essential for maintaining the pressure switch circuit and ensuring clean combustion. As an OEM York heating part, it provides an exact drop in fit for specific furnace models, eliminating the need for