Reznor 39651 Orifice

The Reznor 39651 is a precision-engineered #49 Natural Gas burner orifice, designed specifically for technicians servicing Reznor unit heaters. As an authentic OEM component, this natural burner orifice provides the exact flow rate required to maintain the design manifold pressure and BTU input of the heating system. Manufactured from high-grade brass to withstand the thermal stress of continuous combustion cycles, the Reznor replacement part 39651 ensures clean, efficient natural gas combustion while preventing soot buildup or incomplete burns—common issues when using non-compliant or incorrectly sized aftermarket fittings.

For contractors performing seasonal maintenance or fuel conversions, utilizing the correct Reznor 39651 orifice is critical for achieving optimal flame patterns and preventing nuisance lockouts. This component is compatible with a wide range of Reznor air handling and unit heating equipment that utilizes a #49 drill size for natural gas delivery. When replacing, always verify the orifice stamp to ensure it matches the nameplate requirements of the specific burner manifold you are servicing to maintain manufacturer-specified performance levels.

• OEM Precision: Guaranteed #49 drill size for accurate natural gas flow regulation.
• Durable Brass Construction: Resists corrosion and high-temperature oxidation in the burner manifold.
• Optimized Combustion: Eliminates "lazy" flames and carbon monoxide concerns by ensuring the correct gas-to-air ratio.
• Perfect Fitment: Eliminates the risk of thread leaks or seating issues common with universal parts.

• Can I use this orifice for propane (LP) conversion? No, the Reznor 39651 is specifically sized for natural gas. Propane requires a smaller orifice diameter due to its higher BTU density.
• How do I verify the size? This Reznor orifice is stamped with the #49 designation. Always check this against the technical specifications in the unit's installation manual.
• Does this fit all Reznor heaters? While widely used, compatibility depends on the specific BTU rating and manifold design. Verify your part number before installation.

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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.