Williams 4318 Deflector 321042-401 precision-engineered to maintain optimal CFM

precision-engineered to maintain optimal CFM output and heat exchanger efficiency

With an accuracy of ±1

you ensure 100% compatibility with existing wiring harnesses

The 5500-134M 120V control utilizes a heavy-duty rotary design with 8-32 UNC mounting threads for superior screw engagement compared to stamped alternatives

Williams 4318 Deflector 321042-401 precision-engineered to maintain optimal CFMField technicians and HVAC contractors know that managing exhaust discharge is critical for system longevity and building safety. The Williams 4318 Vent Shield Deflector is a job site essential for high performance installations involving direct vent wall furnaces. This HVAC vent heat shield is engineered as an insulated galvanized metal sheet, specifically designed to mount externally between the exterior wall and the vent cap. Its primary function