Broad Compatibility: Serves as a direct replacement for multiple Lennox and OEM part numbers

It is designed for use in DFG series (75-400)

Engineered for direct service substitution

Precision-calibrated for high-limit protection

Nordyne 904781 Heat Exchanger 320734-701 Broad Compatibility: Serves as aThe Nordyne 904781 Heat Exchanger is an critical OEM furnace replacement part engineered for high efficiency heat transfer in Nordyne, Miller, and Intertherm gas fired heating systems. Designed to withstand the thermal stress of residential and light commercial duty cycles, this primary heat exchanger ensures clean separation between combustion gases and the indoor air stream. As a genuine Nordyne 904781 component, it maintains the precise static