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Bard 171-256BX - Heat Exchanger Assembly 67.5K

The Bard 171-256BX is an OEM heat exchanger assembly rated at 67.5K BTU, used in Bard wall mounted gas/electric package units to transfer heat safely and efficiently from the burner section into the supply air stream. When a heat exchanger is cracked, leaking, or showing heavy corrosion, replacing it with the correct factory assembly helps restore dependable heating performance and supports proper combustion airflow and temperature rise. Because heat exchangers are model and capacity specific, confirm your unit model and serial number against the Bard replacement parts literature before ordering to ensure the 171-256BX is the exact match for your application.


  • Technical Specifications
  • Product number: 171-256BX
  • Manufacturer description: Heat Exchanger Assy 67.5K Serivce
  • HTS Code: "8419.50.5000"

  • Previous Versions
  • S171-256 (Obsolete, superseded by 171-256BX)
  • 171-256 (Obsolete, superseded by S171-256)

$1,650.00 *

* 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.