Lennox 98L31 Natural Orifice 322055-301 and G27 series units

and G27 series units

Smith 100208410 cross-referenced part

Industrial Build Quality: Features a durable housing and heavy-duty gear set designed for the high-frequency demands of multi-zone forced air systems

Reliable Sealing: Features a molded composition disc bonded to the plug assembly for high-integrity

Adjustable Setpoints: Flexible 5-28"wc high and 2-14"wc low ranges allow for custom tuning to specific burner requirements

Lennox 98L31 Natural Orifice 322055-301 and G27 series unitsThe Lennox 98L31 is a precision engineered natural gas burner orifice designed to regulate fuel flow and ensure stoichiometric combustion in high efficiency heating systems. Featuring a . 0890 drill size and standard 1 8 27 NPT threads, this brass burner orifice serves as a critical component for technicians performing manifold adjustments or gas type conversions on compatible Lennox furnaces and boilers. The Lennox LB 99216 specification ensures that