According to the mechanical code, which type of temperature should the gypsum board surface be maintained above?

The correct answer focuses on the importance of maintaining the gypsum board surface temperature above the dew-point temperature. The dew-point temperature is the temperature at which moisture in the air begins to condense into water. When the surface temperature of the gypsum board falls below the dew-point, condensation can occur, leading to moisture problems such as mold growth or degradation of the board material.

By ensuring the gypsum board is maintained above the dew-point temperature, it helps to prevent moisture accumulation on the surface, thus maintaining the integrity of the installation and the overall structure. This consideration is crucial in environments where high humidity levels might be present, as it safeguards the performance and longevity of the materials used within the mechanical systems.