Lennox 25B19 Air Orifice .860 for Ignition and Noisy Burner Applications

The Lennox 25B19 is an OEM air orifice engineered for use in ignition and noisy burner applications. Featuring a precisely machined .860 orifice diameter, this component regulates airflow to the burner assembly, helping to achieve stable ignition performance and reduce combustion noise. Designed as a direct Lennox replacement part, the 25B19 delivers the exact fit and function required to restore your heating system to peak operating condition.

Key Features

• OEM Lennox replacement air orifice — SKU 25B19
• Precision-machined .860 orifice diameter for accurate airflow control
• Engineered for ignition and noisy burner applications
• Promotes stable, consistent combustion performance
• Helps reduce burner noise caused by improper air-to-fuel ratios
• Direct OEM replacement for hassle-free installation

Application

The 25B19 air orifice is designed for use in Lennox heating systems where precise air metering at the burner is critical. Proper orifice sizing ensures the correct air-to-fuel mixture, supporting reliable ignition and minimizing operational noise. This part is ideal for HVAC technicians performing routine maintenance, burner tune-ups, or noisy burner diagnostics on compatible Lennox equipment.

Why Choose OEM Lennox Parts?

Using genuine Lennox OEM components like the 25B19 ensures compatibility, maintains equipment warranties, and delivers the performance standards your system was designed to meet. Avoid costly callbacks and comebacks by installing the part that was built specifically for your Lennox equipment.