Process gas collection systems for lumber drying operations

A process gas collection assembly for a continuous kiln, the continuous kiln including a housing having opposed side walls and a roof connecting the side walls, the side walls and roof defining an internal compartment, the assembly comprising:

• at least one elongate internal collection manifold disposed within the at least one interior compartment and fixedly attached to the roof, the at least one internal collection manifold configured to receive process gases from the internal compartment;
• at least one process gas collection port that is external the housing and fluidly connected to the at least one internal collection manifold;
• external collection ductwork that is external the housing and fluidly connected to the at least one process gas collection port;
• discharge ductwork that is external the housing and fluidly connected to the external collection ductwork and that discharges at least a portion of the process gases received in the external collection ductwork;
• and
• a flow induction device disposed between the external collection ductwork and the discharge ductwork, the flow induction device being configured to draw process gases from the internal collection manifold toward the discharge ductwork.