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Bard 171-247BX - Heat Exchanger Assembly 125K

Bard 171-247BX is an OEM heat exchanger assembly rated for 125,000 BTU input, used in Bard wall mounted gas/electric equipment to safely transfer burner heat into the supply airstream while keeping combustion gases isolated from indoor air. When a heat exchanger is cracked, leaking, or failing inspection, replacing it with the correct factory assembly helps restore proper heat output, dependable ignition and draft performance, and safe operation with the original burner and collector box geometry. Because heat exchangers are model and series specific, confirm your unit model and serial data against the Bard parts list or service manual before ordering to ensure the 171-247BX assembly matches your exact 125K configuration.


  • Technical Specifications
  • Product number: 171-247BX
  • Manufacturer description: Heat Exchanger Assy 125K Serivce
  • HTS Code: "8415.90.8085"

  • Previous Versions
  • S171-247 (Obsolete, superseded by 171-247BX)

$2,132.00 *

* 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.