
Lochinvar & A.O. Smith 100112351 Burner Assembly
The Lochinvar & A.O. Smith 100112351 Burner Assembly is a critical component for restoring the combustion efficiency of low-NOx natural gas water heaters and commercial boilers. As a genuine OEM 18-inch natural gas burner kit, this assembly is engineered to maintain the precise thermal output required by high-recovery units. It features a factory-installed #37 orifice, ensuring the correct BTU input and gas-to-air ratio for stable flame propagation and reliable ignition. Designed specifically for compatibility with Lochinvar and A.O. Smith heating systems, this replacement burner assembly (Part 100112351) eliminates the common pilot tracking and soot buildup issues often found in aftermarket alternatives. For contractors performing preventative maintenance on commercial water heaters, this natural gas final burner provides an exact-fit solution that meets all original manufacturer performance specifications.
Key Benefits:
- Direct OEM Replacement: Guarantees internal clearance and mounting alignment for A.O. Smith and Lochinvar boilers.
- Precision Machined #37 Orifice: Provides calibrated natural gas flow for consistent combustion and heat transfer.
- Corrosion-Resistant Construction: Built to withstand high-temperature cycling in demanding HVACR heating applications.
- Reduced Emission Profile: Supports the low-NOx performance requirements of the original equipment design.
Common Questions:
Does this assembly include the orifice?
Yes, this unit comes pre-assembled with a #37 orifice specifically sized for natural gas service in 18-inch burner configurations.
Is this compatible with propane/LP units?
No, the 100112351 burner is engineered for natural gas water heaters only. Converting this assembly to LP requires a different orifice size and is not recommended.
What causes a burner assembly to need replacement?
Technicians typically replace this OEM burner kit when the burner ports become clogged with debris or when the manifold develops cracks, leading to "rumbling" or inefficient gas combustion.
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: $157.67
-65%$157.67
$55.18Lochinvar & A.O. Smith 100112351 Burner Assembly
The Lochinvar & A.O. Smith 100112351 Burner Assembly is a critical component for restoring the combustion efficiency of low-NOx natural gas water heaters and commercial boilers. As a genuine OEM 18-inch natural gas burner kit, this assembly is engineered to maintain the precise thermal output required by high-recovery units. It features a factory-installed #37 orifice, ensuring the correct BTU input and gas-to-air ratio for stable flame propagation and reliable ignition. Designed specifically for compatibility with Lochinvar and A.O. Smith heating systems, this replacement burner assembly (Part 100112351) eliminates the common pilot tracking and soot buildup issues often found in aftermarket alternatives. For contractors performing preventative maintenance on commercial water heaters, this natural gas final burner provides an exact-fit solution that meets all original manufacturer performance specifications.
Key Benefits:
- Direct OEM Replacement: Guarantees internal clearance and mounting alignment for A.O. Smith and Lochinvar boilers.
- Precision Machined #37 Orifice: Provides calibrated natural gas flow for consistent combustion and heat transfer.
- Corrosion-Resistant Construction: Built to withstand high-temperature cycling in demanding HVACR heating applications.
- Reduced Emission Profile: Supports the low-NOx performance requirements of the original equipment design.
Common Questions:
Does this assembly include the orifice?
Yes, this unit comes pre-assembled with a #37 orifice specifically sized for natural gas service in 18-inch burner configurations.
Is this compatible with propane/LP units?
No, the 100112351 burner is engineered for natural gas water heaters only. Converting this assembly to LP requires a different orifice size and is not recommended.
What causes a burner assembly to need replacement?
Technicians typically replace this OEM burner kit when the burner ports become clogged with debris or when the manifold develops cracks, leading to "rumbling" or inefficient gas combustion.
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.
Product Information
Product Information
Shipping & Returns
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Description
The Lochinvar & A.O. Smith 100112351 Burner Assembly is a critical component for restoring the combustion efficiency of low-NOx natural gas water heaters and commercial boilers. As a genuine OEM 18-inch natural gas burner kit, this assembly is engineered to maintain the precise thermal output required by high-recovery units. It features a factory-installed #37 orifice, ensuring the correct BTU input and gas-to-air ratio for stable flame propagation and reliable ignition. Designed specifically for compatibility with Lochinvar and A.O. Smith heating systems, this replacement burner assembly (Part 100112351) eliminates the common pilot tracking and soot buildup issues often found in aftermarket alternatives. For contractors performing preventative maintenance on commercial water heaters, this natural gas final burner provides an exact-fit solution that meets all original manufacturer performance specifications.
Key Benefits:
- Direct OEM Replacement: Guarantees internal clearance and mounting alignment for A.O. Smith and Lochinvar boilers.
- Precision Machined #37 Orifice: Provides calibrated natural gas flow for consistent combustion and heat transfer.
- Corrosion-Resistant Construction: Built to withstand high-temperature cycling in demanding HVACR heating applications.
- Reduced Emission Profile: Supports the low-NOx performance requirements of the original equipment design.
Common Questions:
Does this assembly include the orifice?
Yes, this unit comes pre-assembled with a #37 orifice specifically sized for natural gas service in 18-inch burner configurations.
Is this compatible with propane/LP units?
No, the 100112351 burner is engineered for natural gas water heaters only. Converting this assembly to LP requires a different orifice size and is not recommended.
What causes a burner assembly to need replacement?
Technicians typically replace this OEM burner kit when the burner ports become clogged with debris or when the manifold develops cracks, leading to "rumbling" or inefficient gas combustion.
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.












