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Bard part number 8604-139 is a 6 kW electric heat strip rated for 480V, three phase power with a 3 terminal connection, commonly used as an OEM supplemental or emergency heat option in compatible Bard wall mounted HVAC and heat pump applications. When a unit needs reliable electric heat for colder weather operation, replacing a failed heat strip with the correct Bard OEM assembly helps restore proper heat output and ensures the electrical connection points match the factory design. Before ordering, verify your unit model and the required kW, voltage, phase, and terminal configuration since electric heat kits are application specific and must match the equipment nameplate and installation instructions.