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The Bard 5052-011 Cupro Nickel Coil (5 ton) is an OEM heat transfer coil designed for Bard commercial wall mounted air conditioners and packaged HVAC equipment where corrosion resistance is critical. Cupro nickel coil assemblies are commonly specified for coastal, industrial, or chemically harsh environments because the alloy helps resist corrosion and extends service life compared to standard coil materials. Replacing a compromised coil with the correct Bard factory part helps restore proper capacity, refrigerant performance, and dependable operation, but fit can vary by model and vintage so confirm the part number against your unit model and serial before ordering.