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Bard 139-421BX - Exhaust blade arm
Bard 139-421BX is an OEM exhaust blade arm assembly supplied boxed for service stock, used in Bard wall-mounted HVAC units equipped with an exhaust or power-ventilation function to help position and actuate the exhaust damper or blade mechanism during ventilation operation. Replacing a worn or bent blade arm can restore proper exhaust air movement and damper response, which supports stable building pressurization and more consistent unit performance. For best fit, confirm your unit model and ventilation option, then match this Bard part number to the unit parts list before ordering.
- Technical Specifications
- Product number: 139-421BX
- Manufacturer description: Exhaust Blade Arm - Boxed
- HTS Code: "8415.90.8085"
$72.00
What does the "BX" suffix mean?
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.