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• S171-243 OBSOLETE

• Heat Exchanger Assy 75K

Bard part number S171-243 is an OEM heat exchanger assembly rated for 75K input used in select Bard wall mounted gas electric HVAC units. This component is the sealed combustion heat transfer section that separates flue gases from the airstream while delivering reliable heating performance, making correct fit critical for safe operation and proper temperature rise. Because heat exchanger designs vary by furnace size and model series, confirm compatibility by matching S171-243 to your unit data plate and the Bard service parts literature before ordering, and replace any required gaskets or seals per the manufacturer instructions during installation.