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Bard part number 171-252 is an OEM heat exchanger assembly used in select Bard wall-mounted gas/electric packaged units to safely transfer heat from the burner to the supply air stream. This component is the core of the gas heat section, and replacing it is a common fix when a heat exchanger has failed inspection due to cracks, corrosion, or flue-gas leakage that can cause nuisance limit trips or unsafe operation. Because heat exchanger fit can vary by unit size, BTU input, and low-NOx configuration, match 171-252 to your exact Bard model and serial number before ordering, especially when the unit is a 460V configuration.
* Orders less than $50 may incure a minimum order fee.