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The Navien 30027946B is a genuine OEM kit that converts a Navien NPE-240A2 or NPE-240S2 tankless water heater from natural gas to propane. It ships with the conversion components Navien specifies, including the orifices and gas valve parts needed to set the unit for LP. It is a service part, not an upgrade: it changes fuel type only and adds no capacity or features. Buyers choose it because a factory kit keeps the heater within Navien's spec, unlike generic orifices that can leave combustion off.
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The Navien 30027946B is a propane gas conversion kit for Navien tankless water heaters. It converts compatible units from natural gas to propane (LP) operation. It is a genuine Navien OEM accessory.
The kit is made to the manufacturer's specifications and includes the conversion components Navien specifies for the changeover. It is for installations that run on propane instead of natural gas. It is designed for the Navien NPE-240A2 and NPE-240S2 models.