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The Bard 8604-121BX is an OEM 9 kW, 240V electric heat strip assembly used to add or restore supplemental electric heat in compatible Bard wall-mounted HVAC equipment. Built to Bard fit and electrical specifications, this heater kit is commonly used for staged heating and comfort in colder weather, and it is a direct replacement choice when an existing heat strip is open, damaged, or missing. Confirm unit compatibility by matching the part number and electrical requirements (9 kW at 240V) to your Bard model and wiring diagram before installation.
Bard uses suffixes like "BX" to manage parts internally. These do not change the physical form or function of the part.
A part number ending in "BX" simply means it is packaged in a box for shipping, rather than for internal assembly use.
Example: 8406-142BX is physically identical to 8406-142.