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While the FAN4078 is the official superseding part
preventing the blade distortion common in aftermarket alternatives
serving as a critical safety interlock
Always verify the 1/2 inch shaft diameter and clockwise rotation before installation
Constructed with galvanized steel and a convex center disc
Air Xchange 18580199 Belt 318172-701 While the FAN4078 is theThe Air Xchange 18580199 Belt is a high performance heat wheel belt specifically engineered to maintain the rotation of energy recovery ventilation (ERV) components. This specialized 3L C Link belt is the direct performance replacement for the 18580200 model, ensuring seamless compatibility with AirXchange ERC 5856, ERC 5862, and ERC 5874 units. Fabricated from durable polyurethane materials, it is designed to withstand the rigorous demands of