The Rinnai FOT-150 Flue Short (S) 3″-4½″, part number FOT-150, is a direct vent flue manifold termination kit designed for Rinnai direct vent furnaces with exterior wall venting requirements in the 3″ to 4½″ thickness range. It provides a compact vent termination assembly that routes combustion exhaust gases safely through an exterior wall when installing a direct vent wall furnace. This component is built to original equipment specifications so it integrates with compatible Rinnai direct vent furnace venting systems without modification.
This flue short kit is intended for use during the installation of Rinnai direct vent wall furnaces or as a replacement when the existing vent termination assembly is worn or damaged. It is specifically sized for situations where the wall thickness falls within the 3″ to 4½″ range and helps ensure proper exhaust routing while maintaining the combustion system’s draft characteristics. Installation must follow the furnace manufacturer’s venting instructions to maintain required clearances, secure connections, and compliance with applicable codes for direct vent systems.
What’s Included: One (1) Rinnai FOT-150 flue short (S) termination kit for direct vent furnace installations.
Installation Limits: For use only on direct vent furnace installations with wall thickness between 3″ and 4½″; install using manufacturer’s venting procedures and maintain proper clearances to combustibles.
Compatibility: Compatible with Rinnai direct vent furnace models that require the FOT-150 short (S) vent kit for exterior wall vent termination.
