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

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

Designed to replace aging or failing HVAC pressure switches

or freezing condensate if the furnace is located in an unconditioned space

lowering operational strain on your commercial electrical infrastructure

you ensure 100% compatibility with existing wiring harnesses

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