Lennox 73W81 Conversion Kit
The Lennox 73W81 (Part Number 604913-03) is a critical LP to Natural Gas Conversion Kit engineered specifically for technical field conversions of Lennox ML180, EL180, ML193, ML195, EL195, and 80AF1/92AF1/95AF1 series furnaces. This genuine OEM assembly provides 12 main burner orifices sized at 0.063 and a precise gas valve regulator spring to ensure proper manifold pressure adjustments from propane back to natural gas operation. For contractors, this kit is the standard for maintaining factory specifications and pressure regulation accuracy during a fuel changeover.
When performing the installation, technicians must ensure the Lennox 73W81 conversion kit is used in applications from 0 to 4500 feet; elevations exceeding this threshold typically require a separate high-altitude pressure switch to accommodate thinner air density. This furnace fuel conversion kit includes all necessary labeling, such as the gas converter and nameplate stickers, to remain compliant with local mechanical codes and safety standards. Using the Lennox 604913-03 ensures that the burner flame characteristics and ignition timing remain within the tight tolerances required by high-efficiency condensing and non-condensing units.
Key Benefits:
- OEM Compatibility: Precision-matched for Lennox ML/EL series furnaces, ensuring zero-gap fitment and consistent BTU output.
- Comprehensive Hardware: Includes 12 high-tolerance 0.063 burner orifices and a dedicated Honeywell/White-Rodgers spring kit for regulator recalibration.
- Code Compliance: Comes with mandatory nameplate conversion and gas control stickers to satisfy inspector requirements.
- Performance Stability: Restores factory-spec natural gas combustion parameters for 80% and 90%+ AFUE models.
Common Questions:
Does this kit work for high-altitude installations?
The Lennox 73W81 provides the correct orifices for standard elevations. However, for installations above 4,501 feet, you must check the specific unit manual as a different pressure switch may be required to prevent nuisance tripping.
Is the gas valve regulator spring included in this kit?
Yes, the kit contains the specific regulator spring needed to convert the gas valve's internal diaphragm tension from LP pressure (typically 10" W.C.) to natural gas pressure (typically 3.5" W.C.).
Can I use this for other furnace brands?
No. This is a Lennox genuine OEM part designed specifically for the manifold threading and regulator housings of the Lennox ML and EL furnace lines.
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.
Original: $193.28
-65%$193.28
$67.65Lennox 73W81 Conversion Kit
The Lennox 73W81 (Part Number 604913-03) is a critical LP to Natural Gas Conversion Kit engineered specifically for technical field conversions of Lennox ML180, EL180, ML193, ML195, EL195, and 80AF1/92AF1/95AF1 series furnaces. This genuine OEM assembly provides 12 main burner orifices sized at 0.063 and a precise gas valve regulator spring to ensure proper manifold pressure adjustments from propane back to natural gas operation. For contractors, this kit is the standard for maintaining factory specifications and pressure regulation accuracy during a fuel changeover.
When performing the installation, technicians must ensure the Lennox 73W81 conversion kit is used in applications from 0 to 4500 feet; elevations exceeding this threshold typically require a separate high-altitude pressure switch to accommodate thinner air density. This furnace fuel conversion kit includes all necessary labeling, such as the gas converter and nameplate stickers, to remain compliant with local mechanical codes and safety standards. Using the Lennox 604913-03 ensures that the burner flame characteristics and ignition timing remain within the tight tolerances required by high-efficiency condensing and non-condensing units.
Key Benefits:
- OEM Compatibility: Precision-matched for Lennox ML/EL series furnaces, ensuring zero-gap fitment and consistent BTU output.
- Comprehensive Hardware: Includes 12 high-tolerance 0.063 burner orifices and a dedicated Honeywell/White-Rodgers spring kit for regulator recalibration.
- Code Compliance: Comes with mandatory nameplate conversion and gas control stickers to satisfy inspector requirements.
- Performance Stability: Restores factory-spec natural gas combustion parameters for 80% and 90%+ AFUE models.
Common Questions:
Does this kit work for high-altitude installations?
The Lennox 73W81 provides the correct orifices for standard elevations. However, for installations above 4,501 feet, you must check the specific unit manual as a different pressure switch may be required to prevent nuisance tripping.
Is the gas valve regulator spring included in this kit?
Yes, the kit contains the specific regulator spring needed to convert the gas valve's internal diaphragm tension from LP pressure (typically 10" W.C.) to natural gas pressure (typically 3.5" W.C.).
Can I use this for other furnace brands?
No. This is a Lennox genuine OEM part designed specifically for the manifold threading and regulator housings of the Lennox ML and EL furnace lines.
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.
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Description
The Lennox 73W81 (Part Number 604913-03) is a critical LP to Natural Gas Conversion Kit engineered specifically for technical field conversions of Lennox ML180, EL180, ML193, ML195, EL195, and 80AF1/92AF1/95AF1 series furnaces. This genuine OEM assembly provides 12 main burner orifices sized at 0.063 and a precise gas valve regulator spring to ensure proper manifold pressure adjustments from propane back to natural gas operation. For contractors, this kit is the standard for maintaining factory specifications and pressure regulation accuracy during a fuel changeover.
When performing the installation, technicians must ensure the Lennox 73W81 conversion kit is used in applications from 0 to 4500 feet; elevations exceeding this threshold typically require a separate high-altitude pressure switch to accommodate thinner air density. This furnace fuel conversion kit includes all necessary labeling, such as the gas converter and nameplate stickers, to remain compliant with local mechanical codes and safety standards. Using the Lennox 604913-03 ensures that the burner flame characteristics and ignition timing remain within the tight tolerances required by high-efficiency condensing and non-condensing units.
Key Benefits:
- OEM Compatibility: Precision-matched for Lennox ML/EL series furnaces, ensuring zero-gap fitment and consistent BTU output.
- Comprehensive Hardware: Includes 12 high-tolerance 0.063 burner orifices and a dedicated Honeywell/White-Rodgers spring kit for regulator recalibration.
- Code Compliance: Comes with mandatory nameplate conversion and gas control stickers to satisfy inspector requirements.
- Performance Stability: Restores factory-spec natural gas combustion parameters for 80% and 90%+ AFUE models.
Common Questions:
Does this kit work for high-altitude installations?
The Lennox 73W81 provides the correct orifices for standard elevations. However, for installations above 4,501 feet, you must check the specific unit manual as a different pressure switch may be required to prevent nuisance tripping.
Is the gas valve regulator spring included in this kit?
Yes, the kit contains the specific regulator spring needed to convert the gas valve's internal diaphragm tension from LP pressure (typically 10" W.C.) to natural gas pressure (typically 3.5" W.C.).
Can I use this for other furnace brands?
No. This is a Lennox genuine OEM part designed specifically for the manifold threading and regulator housings of the Lennox ML and EL furnace lines.
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.
