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Bard part number 171-157 is an OEM WAG heat exchanger (NOx) assembly used in Bard WAG series wall mounted gas/electric units to safely contain combustion and transfer heat into the supply airstream. Replacing a damaged or leaking heat exchanger assembly helps restore proper heating performance and protects the furnace section by maintaining correct flue gas separation, draft operation, and temperature rise. Because heat exchanger applications can vary by model size, fuel setup, and heating capacity, confirm 171-157 against your unit model and serial information before ordering to ensure correct fit and proper operation after installation.
* Orders less than $50 may incure a minimum order fee.