Lennox 32K70 Burner Orifice

The Lennox 32K70 is a precision-engineered Natural Gas Burner Orifice designed specifically for high-efficiency furnace burner assembly integration. With a precise orifice drill size of 0.0917 inches (LB-74093), this component is critical for maintaining the correct manifold pressure and gas-to-air ratio required for clean combustion. As a genuine OEM Lennox replacement part, it ensures seamless compatibility with Lennox heating equipment, eliminating the performance fluctuations often associated with generic alternatives. Correct sizing is non-negotiable for service technicians; installing this 0.0917 gas orifice prevents common combustion issues such as delayed ignition or excessive flame height, which can lead to heat exchanger damage. Built with durable brass or steel construction, it retains its tolerance under high-temperature cycles. Whether you are performing a seasonal tune-up or a specific gas furnace repair, this orifice provides the exact BTU input specified by the manufacturer for optimal system thermal efficiency. Verify your furnace's serial number and gas type to ensure this natural gas component is the correct fit for your service call.

• Precision Gas Flow: The 0.0917-inch diameter is machined to exacting tolerances to ensure consistent BTU delivery across all burner assembly ports.
• System Compatibility: Engineered specifically for Lennox furnaces and heat pump auxiliary heat kits, reducing the risk of improper combustion efficiency.
• Enhanced Safety: Prevents hazardous over-firing or under-firing conditions, protecting the heat exchanger and ensuring a stable furnace flame.
• Rugged Durability: Designed to withstand the corrosive environment of the burner box without degrading or clogging over time.

What happens if the orifice size is incorrect for the gas type?
Using a natural gas orifice like the Lennox 32K70 with LP gas will result in a dangerously large flame because LP requires a much smaller opening. Always verify the gas burner orifice matches the fuel supply to prevent fire hazards.

How do I identify if the 32K70 is the correct part for my Lennox unit?
Check the rating plate on the interior of the furnace cabinet. It will list the required orifice size for natural gas. If your unit calls for a 0.0917" orifice, this 32K70 (LB-74093) is the designated HVAC replacement part.

Does this orifice require special tools for installation?
No, it typically threads into the gas manifold using a standard socket or nut driver. Ensure the manifold is not cross-threaded during installation to maintain a gas-tight seal.

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.