Lennox 54M90 Orifice 320788-704 The York S1-025-43269-000 is an

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this replacement heating element component ensures precise temperature regulation and long-term system stability in both residential and commercial FVIR applications

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Lennox 54M90 Orifice 320788-704 The York S1-025-43269-000 is anThe Lennox 54M90 LP Orifice is a critical metering component designed for precise gas to propane conversion in compatible Lennox heating units. Engineered for durability and high tolerance performance, this 0. 034 inch orifice ensures steady pressure regulation and fuel flow, preventing common combustion issues such as soot buildup or irregular flame patterns. For contractors performing a Lennox furnace LP conversion, using OEM spec orifices is