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The Bard S913-0003 induced draft blower assembly is an OEM combustion air and venting component used on Bard gas heat wall mounted HVAC units to establish proper draft through the heat exchanger and help move flue gases safely to the vent. If your unit is locking out on ignition, showing draft related pressure switch faults, or you are hearing noisy or weak inducer operation, replacing the complete S913-0003 assembly is a common fix that restores reliable pre purge and steady heating performance. For the best fit, confirm your exact Bard model and serial, then match the part number in the unit parts list before ordering.