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it is fully compatible with high-pressure refrigerants
R410A Compatibility: Specifically calibrated for high-pressure R410A refrigerant applications
This part number covers the crankarm only
the 669555R valve stabilizes system performance
Always verify the MFD rating on the old part's label before installation
Lennox 54M90 Orifice 321042-401 it is fully compatible withThe 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
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