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Bard part number 104-821 is an OEM upper heat exchanger fill used in Bard wall mounted HVAC equipment to close off and support the upper heat exchanger area so the unit maintains proper airflow control and safe, efficient heating operation. If this fill panel is missing, damaged, or distorted, the burner and heat exchanger compartment can lose its intended air path, which may contribute to nuisance limit trips, uneven heating performance, or service issues during inspection. As a genuine Bard replacement, 104-821 is built to match factory fit and mounting points for a straightforward swap when servicing the heat section; confirm compatibility by model and serial number and replace any compromised seals or insulation in the same area as needed.
* Orders less than $50 may incure a minimum order fee.