The Reznor 99259 Conversion Kit is a critical OEM component designed for technicians performing a field transition from Liquid Propane (LP) to Natural Gas. Engineered specifically for Reznor F-75 and B-75 unit heaters, this LP to Natural Gas conversion kit ensures the manifold pressure and burner orifices are correctly matched to factory specifications for safe, efficient combustion. As a genuine Reznor replacement part, it maintains the integrity of the heating system without compromising the HVAC gas valve performance. The kit typically includes the necessary burner orifices, a regulator spring kit for the gas valve, and required conversion labeling to comply with local mechanical codes. Key Benefits Ensures precise natural gas manifold pressure for optimal burner flame characteristics and heat output. Includes high-precision unit heater orifices specifically sized for the 75,000 BTU input rating of F and B series models. Facilitates a seamless fuel transition, allowing for the use of more cost-effective natural gas utility lines. Maintains OEM equipment standards, ensuring compatibility with existing Honeywell or Robertshaw gas valves found on F/B-75 units. Common Questions Which specific Reznor models is the 99259 kit compatible with? This kit is engineered exclusively for the Reznor F-75 and B-75 models. Verified compatibility with your specific serial number is recommended before installation. Does this kit include the regulator spring? Yes, the 99259 kit typically includes the natural gas regulator spring required to convert the existing LP gas valve to the lower pressure required for natural gas operation. Can I use this for a Natural Gas to LP conversion? No, this is a propane to natural gas conversion kit. Transitioning from natural gas to LP requires a different kit with smaller orifices and a high-pressure regulator spring. 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.
