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Bard part number S170-232 is an OEM heat exchanger for Bard TU110 gas furnace equipment, built to restore safe, efficient heat transfer from the burner section into the supply air stream. When a heat exchanger is damaged or compromised, it can affect temperature rise, ignition performance, and overall heating reliability, so replacing it with the correct Bard factory part helps maintain proper fit and performance to the original unit specifications. Verify compatibility by matching the complete TU110 model number and serial number from the rating plate before ordering, since heat exchanger configurations can vary by furnace size and revision.