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Bard part number 168-149 is an OEM collector box used in Bard wall-mounted gas/electric packaged units as part of the flue and combustion byproduct path between the heat exchanger and the inducer/venting components. When a collector box is cracked, leaking, or warped, you can see condensate or flue-gas leakage, ignition issues, nuisance safeties, or poor draft, so replacing it with the correct Bard factory part helps restore proper airflow through the heat section and keeps the furnace compartment operating as designed. Because collector boxes can vary by heat exchanger and model series, confirm compatibility by matching 168-149 to your unit model and serial information before ordering, and plan to inspect and replace related gaskets or seals during installation if required by your service procedure.