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Bard 8604-134 is an OEM 4 kW, 240V electric heat strip with a 2 terminal connection, used as supplemental or emergency heat in compatible Bard wall mount and packaged HVAC units. This resistance heater mounts in the factory heat section and is designed to bring back reliable staged heating output when the original element has failed or is open, helping the unit maintain setpoint during cold weather and defrost conditions where applicable. Verify kW, voltage, and terminal style against your Bard model and wiring diagram before ordering, since heat kit sizing and controls vary by unit series and serial number.