The RHEEM MFG COMPANY 10 in. 3 Units Inline Direct Vent Header Kit is designed for efficient venting in multi-unit heating systems. This kit includes all necessary components for a complete installation, ensuring optimal airflow and venting performance. Constructed from durable materials, it is built to withstand various environmental conditions while maintaining efficiency. The kit is compatible with a range of RHEEM models, making it a versatile choice for both residential and commercial applications. Enhance your heating system's performance with this reliable direct vent header kit.