Lennox 60G79 Heat Exchanger under-4000 the MK-4421 is designed for

the MK-4421 is designed for easy installation

this burner assembly delivers consistent heat and flame appearance

LP conversion kit for easy adaptation to different fuel types

preventing any abrupt disruptions in your fan's operation

FWSC Sensor and take control of your building's environmental conditions like never before

Lennox 60G79 Heat Exchanger under-4000 the MK-4421 is designed forLennox 60G79 Heat Exchanger: High Performance Solution for Optimal Heat Transfer Introducing the Lennox 60G79 Heat Exchanger, the ultimate solution engineered to deliver exceptional heat transfer efficiency and maximize the performance of your heating system. Designed with precision and expertise, this heat exchanger is built to withstand rigorous conditions and provide reliable, long lasting performance. With its advanced features and cutting edge