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Lennox 84K47 is a replacement heat exchanger (manufacturer part number 84K47) designed for HVAC systems to transfer thermal energy between refrigerant and air. The OEM part is listed as LB-91398C and is supplied as an individual heat exchanger assembly that fits multiple Lennox models.
OEM Lennox heat exchanger assembly (84K47) cross-referenced to LB-91398C, sold each, fits 32 models.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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