Lennox 18L12 Conversion Kit

Nat -> LP Conversion Kit

18L12 is the direct replacement for 165295205, 20L07

Lennox 18L12 Natural to LP/Propane Gas Conversion Kit (617168-02)
Upgrade your Lennox unit heater for efficient propane operation with the Lennox 18L12 Conversion Kit. Designed to convert natural gas systems to LP/propane, this OEM kit ensures compatibility, safety, and optimal performance across approved Lennox models. Featuring a precise 0.0571" (1.45mm) orifice size, it delivers proper fuel flow and reliable combustion.

Key Features

• OEM Genuine Lennox Part – Built for reliable and safe system performance

• Natural Gas to LP/Propane Conversion – Ideal when switching fuel sources in commercial or industrial applications

• Orifice Size: 0.0571" (1.45mm)

• Altitude Rating:

  • U.S.: 0–5000 ft

  • Canada: 0–7500 ft

• Designed for units equipped with White Rodgers 36G gas valve

Compatible Models

• UHCM / LF25 / UHSC / LS25 Series

• Unit capacities: 125, 150, 175, 200

Kit Includes

• (8) Burner Orifices (#56)

• White Rodgers Pressure Measuring Adapter Kit

• White Rodgers 36G Series Gas Valve Conversion Kit

• (3) Conversion Stickers

Specifications

Product Overview

The Lennox 18L12 / 617168-02 Conversion Kit offers a complete, OEM-approved solution for converting Lennox unit heaters from natural gas to LP/propane fuel. Designed for compatibility with several unit heater families, this kit ensures proper gas regulation, burner performance, and compliance with factory specifications.