these part numbers are technically identical and serve as direct replacements for each other in all Lennox-brand applications

or Luxaire climate system

a different rebuilding kit is required

This specific model is designed for hot water heating boilers and domestic supply systems

Utilizing genuine Williams furnace parts ensures compliance with local mechanical codes and preserves the structural reliability of the unit during peak heating cycles

Heil Quaker ICP 1183390 Heat Exchanger Kit mario these part numbers are technicallyThe Heil Quaker ICP 1183390 Heat Exchanger Kit is a critical OEM furnace replacement part engineered for high efficiency thermal transfer in International Comfort Products (ICP) heating systems. As a veteran grade HVAC heat exchanger kit, the 1183390 is manufactured to withstand the rigorous expansion and contraction cycles that typically lead to stress cracks in substandard aftermarket cells. This genuine replacement ensures factory spec furnace heat