reducing the risk of soot buildup or uneven heating across the heat exchanger cells

The Carrier 311213-403 Collector Box is the genuine OEM replacement designed specifically for the cold end of 90% AFUE secondary heat exchangers

catastrophic mechanical failure

For optimal service life and to prevent sediment buildup in the armature

it excels at maintaining stable downstream delivery in 2 PSI or 5 PSI piping systems

Reznor 216755 Housing Assembly 323055-751 reducing the risk of sootThe Reznor 216755 Housing Assembly is a high performance venter housing assembly engineered specifically for industrial heating applications where precise airflow management is non negotiable. Designed for compatibility with high efficiency Reznor unit heaters and duct furnaces, this assembly serves as the structural foundation for the induced draft system, ensuring the blower wheel and motor maintain optimal static pressure throughout the combustion