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Bard 171-326BX - Heat Exchanger Assembly 50K

The Bard 171-326BX is an OEM heat exchanger assembly rated for 50,000 BTU input used in Bard wall mounted gas/electric equipment, where it safely transfers heat from the burner into the airstream while keeping combustion gases isolated from the supply air. Replacing a worn or compromised heat exchanger is critical for reliable heating operation and for maintaining proper limit switch performance and safe venting. This service heat exchanger assembly is built to Bard specifications for correct fit in the burner section, but you should always confirm compatibility by matching your unit model and serial information to the Bard parts list or service manual before ordering.


  • Technical Specifications
  • Product number: 171-326BX
  • Manufacturer description: Heat Exchanger Assy 50K Service
  • Weight: 75.000 lbs
  • HTS Code: "8415.90.8085"

  • Previous Versions
  • S171-326 (Obsolete, superseded by 171-326BX)

$1,142.00 *

* Orders less than $50 may incure a minimum order fee.

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.