Lennox 73W81 Conversion Kit

LP TO NAT CONV KIT

Lennox 73W81 Conversion Kit – LP to Natural Gas Conversion Kit (604913-03) for ML/EL Series Furnaces

The Lennox 73W81 (Part #604913-03) is a genuine OEM LP to Natural Gas Conversion Kit, designed specifically for Lennox furnace models in the ML180, EL180, ML193, ML195, EL195, 80AF1, 92AF1, and 95AF1 series. This kit allows for safe and reliable conversion of furnaces originally configured for LP (propane) fuel to operate using natural gas.

This conversion kit is engineered to meet strict Lennox performance and safety standards and includes all necessary components for a straightforward, code-compliant installation.

🔧 Key Features:

• Catalog Number: 73W81

• Model/Part Number: 604913-03

• Type: LP (Propane) to Natural Gas Conversion Kit

• For Use With: Lennox ML180, EL180, ML193, ML195, EL195, 80AF1, 92AF1, and 95AF1 furnaces

• Orifice Size: 0.063

• Weight: 0.3 lbs

• Brand: Lennox (OEM)

✅ Kit Includes:

• (12) Main burner orifices (0.063)

• Gas valve regulator spring

• Gas converter sticker

• Nameplate conversion sticker

💡 Additional Notes:

• Units installed at elevations above 4501 ft may require a pressure switch change (sold separately).

• Always refer to your unit’s installation manual and local codes for proper conversion procedures.

🔍 Benefits:

• ✅ Genuine Lennox OEM part for guaranteed compatibility and performance

• ✅ Converts LP furnaces to natural gas safely and efficiently

• ✅ Complete kit for a hassle-free installation

• ✅ Supports a wide range of Lennox residential furnace models

• ✅ Reduces fuel cost in areas where natural gas is more accessible or economical

Upgrade your heating system with confidence using the Lennox 73W81 Conversion Kit — the trusted OEM solution for converting LP furnaces to clean, efficient natural gas.