Depending on the types of activities performed in a building and/or the geographical location, an evaporator can be exposed to some pretty harsh environments. Chemicals, salt, and various manufacturing processes can drastically reduce the life of an evaporator if it doesn’t have a protective coating.
Corrosive environments, whether they’re due to processes in a factory or salt water exposure on the East or West Coasts, are extremely tough on evaporators. Even though it costs more to have a coating applied to an evaporator, it can be beneficial in the long run because the evaporator will last longer.