Lennox 51W11 Vent Kit

The Lennox 51W11 Vent Kit (OEM part 605384-01) is a professional-grade flush mount vent termination kit designed to isolate intake and exhaust lines for high-efficiency gas furnaces. As a veteran-preferred solution for achieving a clean, low-profile exterior finish, this kit is compatible with 2-inch, 2.5-inch, and 3-inch PVC pipe. It is specifically engineered for Lennox high-efficiency condensing units, ensuring proper airflow dynamics while preventing the recirculation of flue gases. The assembly includes a 1.5-inch exhaust accelerator, which is a critical component for specific 045, 070, and 090 input models to maintain correct venting velocity. Contractors value this kit for its ability to meet strict building codes while providing a discreet alternative to traditional concentric vents. The package comes complete with a mounting template, screws, and anchors to ensure precise center-line spacing, which is vital for maintaining the 4-inch separation required between the horizontal or vertical intake and exhaust paths. This kit is a reliable choice for direct vent furnace installation where aesthetic integration is as important as technical performance.

• Universal Compatibility: Works seamlessly with 2", 2.5", and 3" vent piping, allowing for field flexibility during furnace retrofits.
• Low-Profile Aesthetics: Mounts flush against the structure's exterior wall to reduce the risk of mechanical damage and improve building appearance.
• Optimized Combustion: Includes a dedicated accelerator to ensure flue gases are projected away from the intake, preventing furnace trippage.
• Contractor-Ready Kit: Ships with a precise installation template to guarantee exact hole placement and spacing for code-compliant air distribution.

• Is the exhaust accelerator required for all Lennox furnaces? No, the included 1.5-inch accelerator is specifically required for 045, 070, and 090 input models. Always verify the furnace installation manual for specific venting requirements.
• Can I use this kit for Canadian installations? While the 51W11 is suitable for many applications, Canadian contractors should verify if their local code requires the ULC S636 certified version, often listed as 51W12.
• What is the required spacing between the intake and exhaust? The provided template maintains a critical 4-inch center-line to center-line distance to ensure the internal baffle correctly isolates the two air streams.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.