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Bard part 9022-074 is an OEM Air Tube Combination used in Bard oil-fired furnace burner assemblies to deliver combustion air where it is needed for steady ignition and clean, consistent burner operation. When an air tube is damaged, warped, or carboned up, it can contribute to hard starts, poor flame quality, or nuisance shutdowns, so replacing it with the correct factory part helps restore proper burner setup and reliable heat output. As with any burner component, confirm the exact furnace model and parts list match before ordering so the length and mounting details align with your existing burner configuration.