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Bard part number 7003-008 is an OEM 17 x 32 x 1 air filter used in select Bard wall mounted HVAC units to help protect the indoor coil and blower by capturing airborne dust and debris before it enters the air stream. Keeping the correct factory size filter in place supports proper airflow, helps the system heat and cool as designed, and can reduce nuisance service issues caused by dirty components. If your unit calls for this exact size, 7003-008 is the right fit to restore filtration performance without modifying the filter rack.