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Oftentimes, using stainless steel components seems like a simple solution to corrosion on Steel Coils. You may see fins or tubes or other parts of the system show signs of corrosion, and it seems that the best option is to change the coil to stainless steel, solving the corrosion problem permanently. While this seems like a simple solution to a significant problem in the HVAC, industrial, and commercial systems where coils are found, the answer to the question “should I make an all-stainless coil?” is far more complex.

To better understand the potential impact of using an all stainless steel heat exchanger, let us evaluate an example 400,000 BTU/HR (33 tons or 119 kW) cooling coil. For the example, we will use 45° F water and a 36″ x 45″ coil with standard copper tubes and aluminum fins. The coil for this installation will be 12″ deep, weigh 320 pounds and have a cost factor of 1.0. This is our base unit and is the component currently installed in the system.