What type of systems should gypsum boards not be used in?

Gypsum boards are not recommended for use in evaporative cooler systems due to their susceptibility to moisture. Evaporative coolers work on the principle of pulling air through water-saturated pads, generating humidity in the process. This high moisture environment can cause gypsum boards to deteriorate, break down, and lose structural integrity, as they are not designed to withstand prolonged exposure to water or high humidity levels.

In contrast, gypsum boards may be acceptable in heating, cooling, and ventilation systems where they typically do not face the same moisture concerns. These systems operate in drier conditions or within controlled environments that do not expose gypsum to excessive moisture. Understanding the material properties of gypsum and the operational characteristics of different systems is crucial for making informed choices about construction and installation.