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Bard part number 8604-138 is an OEM electric heat strip rated 9 kW for 240V three-phase systems with a 6-terminal connection layout, used as supplemental or staged electric heat in compatible Bard wall-mount and packaged HVAC equipment. This replacement heater element is built to match Bard electrical and mounting requirements so you can restore factory heating performance after a failed or open element, and it is intended to be installed and wired per the unit wiring diagram and the specific heat package configuration for your model to confirm proper kW staging and overheat protection compatibility.