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• S171-315 OBSOLETE

• Heat Exchanger 75K Service

Bard S171-315 is an OEM 75,000 BTU heat exchanger assembly used in Bard wall-mounted gas/electric HVAC units, where it safely transfers burner heat into the airstream while keeping combustion gases contained. This service heat exchanger is a critical mechanical component for restoring proper heating performance when the original exchanger is damaged, cracked, or failing inspection, and it is designed to match Bard’s factory fit and airflow path within the burner section. Confirm your unit’s exact model and serial number against the Bard parts manual before ordering, since heat exchanger sizing is model-specific and must match the furnace input rating.