this is specifically designed for indoor blower assemblies and 9-10 inch blower housings

Chattering

Optimized Performance: Operates at 3300 RPM to effectively vent exhaust gasses

loosen the seal nut and turn the adjusting stem clockwise to raise the setpoint

Can I use this in a return air plenum

Trane BRD1816 Circuit Board 319825-402 this is specifically designed forThe Trane BRD1816 (also identified by part number BRD01816 and alternate part number 0226463197) is a heavy duty Trane circuit board specifically engineered for high performance heat module and exhaust comparative enthalpy control. As a critical primary control component for commercial grade HVAC systems, this HVAC control board utilizes factory programmed algorithms to regulate sequence of operation, ignition timing, and safety circuit monitoring.