This Reznor assembly is designed as a component for HVAC systems, specifically to encase the flue or exhaust components of a heating unit. The assembly aids in the proper venting of gases, ensuring that they are directed away from the unit efficiently and safely. It is constructed to be compatible with specific Reznor models, conforming to the necessary specifications for a secure fit and optimal function within the system. The flue wrapper ensures that heat is contained and directed appropriately, contributing to the overall safety and performance of the heating system.