Description
The Reznor 84853 is a genuine OEM #47 burner orifice designed as a direct replacement for compatible Reznor heating units. Burner orifices are precision-machined components that regulate the flow of gas into the burner assembly, ensuring the correct fuel-to-air mixture for safe, efficient, and consistent combustion performance.
Product Overview
As an OEM-specified part, the Reznor 84853 maintains the original design tolerances required for proper burner operation. Using the correct orifice size is critical to achieving rated heating output, maintaining combustion efficiency, and complying with the unit’s safety requirements. The #47 drill size designation indicates a specific orifice diameter calibrated for the gas type and pressure rating of the applicable Reznor equipment.
Key Features
- Genuine Reznor OEM replacement burner orifice
- #47 drill size for precise gas metering
- Engineered to maintain proper fuel-to-air combustion ratios
- Direct-fit replacement for compatible Reznor heating equipment
- Supports safe, efficient, and consistent burner operation
- Precision-machined for accurate and repeatable flow control
Application
Refer to your Reznor unit’s service manual or parts list to confirm compatibility before installation. Always verify the correct orifice size and gas type (natural gas or LP) for your specific model to ensure proper combustion and safe operation.







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