Lennox 25W74 Manifold
The Lennox 25W74 Gas Manifold (OEM part number 100795-01) is a precision-engineered gas distribution component designed for high-efficiency residential and light commercial furnace burners. As a critical point of regulation, this manifold ensures localized gas pressure is balanced across all burner tubes, facilitating consistent ignition and optimal combustion cycles. Built with heavy-duty materials to withstand thermal stress and pressure fluctuations, the 25W74 serves as the primary gateway between the natural gas valve and the burner assembly. Its compact geometry allows for streamlined installation in direct-vent and standard chimney-vented units, maintaining reliable fuel-to-air ratios. For contractors, utilizing a genuine Lennox replacement part is essential for maintaining the factory-specified manifold pressure and preventing nuisance flame sensor lockouts or uneven heat exchanger loading. This manifold is engineered for high-demand environments where HVAC gas flow regulation and long-term structural integrity are non-negotiable for system safety.
Key Benefits- Optimized Gas Distribution: Ensures uniform fuel delivery to all burner ports for efficient thermal transfer.
- Direct OEM Compatibility: Replaces Lennox 25W74 and 100795-01, eliminating the need for field modifications.
- Heavy-Duty Construction: Resists corrosion and mechanical fatigue in high-temperature furnace vestibules.
- Precise Pressure Regulation: Maintains calibrated manifold pressure to support steady BTU output.
What are the symptoms of a failing Lennox gas manifold?
Common indicators include uneven flame height across burners, delayed ignition, or visible corrosion and soot buildup on the manifold body that can impede gas flow. Always check for hairline cracks during annual heat exchanger inspections.
Is the 25W74 compatible with Liquid Propane (LP) systems?
While the manifold itself provides the structure for gas flow, conversion to LP requires the specific Lennox spring and orifice kit designed for the gas valve and burner assembly. Verify your specific model's conversion requirements before installation.
Does this manifold include the burner orifices?
This is the manifold tube assembly. Orifices are typically ordered separately or salvaged from the existing unit, depending on the condition of the threads and the required orifice size for the local altitude.
This item is not eligible for free shipping.
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: $292.22
-65%$292.22
$102.28Lennox 25W74 Manifold
The Lennox 25W74 Gas Manifold (OEM part number 100795-01) is a precision-engineered gas distribution component designed for high-efficiency residential and light commercial furnace burners. As a critical point of regulation, this manifold ensures localized gas pressure is balanced across all burner tubes, facilitating consistent ignition and optimal combustion cycles. Built with heavy-duty materials to withstand thermal stress and pressure fluctuations, the 25W74 serves as the primary gateway between the natural gas valve and the burner assembly. Its compact geometry allows for streamlined installation in direct-vent and standard chimney-vented units, maintaining reliable fuel-to-air ratios. For contractors, utilizing a genuine Lennox replacement part is essential for maintaining the factory-specified manifold pressure and preventing nuisance flame sensor lockouts or uneven heat exchanger loading. This manifold is engineered for high-demand environments where HVAC gas flow regulation and long-term structural integrity are non-negotiable for system safety.
Key Benefits- Optimized Gas Distribution: Ensures uniform fuel delivery to all burner ports for efficient thermal transfer.
- Direct OEM Compatibility: Replaces Lennox 25W74 and 100795-01, eliminating the need for field modifications.
- Heavy-Duty Construction: Resists corrosion and mechanical fatigue in high-temperature furnace vestibules.
- Precise Pressure Regulation: Maintains calibrated manifold pressure to support steady BTU output.
What are the symptoms of a failing Lennox gas manifold?
Common indicators include uneven flame height across burners, delayed ignition, or visible corrosion and soot buildup on the manifold body that can impede gas flow. Always check for hairline cracks during annual heat exchanger inspections.
Is the 25W74 compatible with Liquid Propane (LP) systems?
While the manifold itself provides the structure for gas flow, conversion to LP requires the specific Lennox spring and orifice kit designed for the gas valve and burner assembly. Verify your specific model's conversion requirements before installation.
Does this manifold include the burner orifices?
This is the manifold tube assembly. Orifices are typically ordered separately or salvaged from the existing unit, depending on the condition of the threads and the required orifice size for the local altitude.
This item is not eligible for free shipping.
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 25W74 Gas Manifold (OEM part number 100795-01) is a precision-engineered gas distribution component designed for high-efficiency residential and light commercial furnace burners. As a critical point of regulation, this manifold ensures localized gas pressure is balanced across all burner tubes, facilitating consistent ignition and optimal combustion cycles. Built with heavy-duty materials to withstand thermal stress and pressure fluctuations, the 25W74 serves as the primary gateway between the natural gas valve and the burner assembly. Its compact geometry allows for streamlined installation in direct-vent and standard chimney-vented units, maintaining reliable fuel-to-air ratios. For contractors, utilizing a genuine Lennox replacement part is essential for maintaining the factory-specified manifold pressure and preventing nuisance flame sensor lockouts or uneven heat exchanger loading. This manifold is engineered for high-demand environments where HVAC gas flow regulation and long-term structural integrity are non-negotiable for system safety.
Key Benefits- Optimized Gas Distribution: Ensures uniform fuel delivery to all burner ports for efficient thermal transfer.
- Direct OEM Compatibility: Replaces Lennox 25W74 and 100795-01, eliminating the need for field modifications.
- Heavy-Duty Construction: Resists corrosion and mechanical fatigue in high-temperature furnace vestibules.
- Precise Pressure Regulation: Maintains calibrated manifold pressure to support steady BTU output.
What are the symptoms of a failing Lennox gas manifold?
Common indicators include uneven flame height across burners, delayed ignition, or visible corrosion and soot buildup on the manifold body that can impede gas flow. Always check for hairline cracks during annual heat exchanger inspections.
Is the 25W74 compatible with Liquid Propane (LP) systems?
While the manifold itself provides the structure for gas flow, conversion to LP requires the specific Lennox spring and orifice kit designed for the gas valve and burner assembly. Verify your specific model's conversion requirements before installation.
Does this manifold include the burner orifices?
This is the manifold tube assembly. Orifices are typically ordered separately or salvaged from the existing unit, depending on the condition of the threads and the required orifice size for the local altitude.
This item is not eligible for free shipping.
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.
