Reznor 129543 Venter Assembly R-407A providing a direct fit for

providing a direct fit for systems requiring 120V power input and diagnostic LED capabilities

while the Buna-N paddle ensures a bubble-tight

Smith commercial units starting from serial #4015

System Integrity: Prevents industrial smoke circulation by triggering immediate blower lockout during emergency events

substituting it with a single-stage switch will prevent the furnace from modulating correctly and will likely trigger a control board lockout

Reznor 129543 Venter Assembly R-407A providing a direct fit forThe Reznor 129543 Venter Motor and Wheel Assembly is a critical OEM replacement part engineered for high performance combustion exhaust in industrial and commercial gas fired unit heaters. Operating at 208 230V, this centrifugal venter assembly is purpose built for Reznor UDAP, UDAS, UDBP, and UDBS models, specifically in the 200 to 400 MBH size range. As an integrated unit, it features a precision balanced venter wheel and a resiliently isolated