Lennox 11K44 Conversion Kit

As a veteran technician, you know that high-altitude gas furnace performance requires precise fuel-to-air ratios to prevent combustion instability and carboning. The Lennox 11K44 Conversion Kit is a critical genuine OEM replacement part specifically engineered to convert Lennox residential gas furnaces from natural gas to LP/Propane at elevations between 7,501 and 10,000 feet. This high-altitude LP conversion kit is compatible with the Lennox ML180, EL180, ML193, ML196, and Lennox EL196 series units. The kit includes 0.032" main burner orifices, both Resideo and White Rodgers LP regulator springs, a low gas inlet pressure switch (S145), and the necessary conversion stickers to ensure your installation meets HVAC technician code requirements. By utilizing this Lennox 11K44 kit, you ensure the manifold pressure is correctly adjusted for low-oxygen environments, maintaining the thermal efficiency and operational safety of the heating system at high-altitude elevations without compromising the heat exchanger.

• Precise High-Altitude Calibration: Engineered for 7,501 to 10,000 ft. elevations with specific 0.032" orifices for balanced combustion.
• Broad Series Compatibility: Fits 80% and 90%+ AFUE Lennox models including ML180, EL180, ML193, and EL196 series.
• Complete Installation Package: Includes dual-brand regulator springs (Resideo/White Rodgers) and the S145 low-pressure switch for a comprehensive field conversion.
• OEM Standards: Ensures the furnace maintains proper derating protocols as specified in the manufacturer's technical literature.

What is the correct orifice size for a Lennox 11K44 at 10,000 feet?
The kit utilizes 0.032" orifices designed to handle the reduced oxygen density found at the 7,501 to 10,000 ft. range.

Which Lennox furnace models are compatible with the 11K44 kit?
This kit is compatible with the Lennox ML180, EL180, ML193, ML196, and EL196 series gas furnaces.

Does this kit include the pressure switch for all high-altitude installs?
The kit includes the S145 low gas inlet pressure switch, though some specific unit configurations may require an additional altitude-specific pressure switch ordered separately based on the unit's installation manual.

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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.