What is the maximum air temperature that gypsum boards can be used to form plenums?

Gypsum boards are commonly used in construction for various applications, including forming plenums in HVAC systems. The maximum air temperature recommended for gypsum boards in these settings is crucial for ensuring their structural integrity and performance.

The correct answer indicates that 125 degrees Fahrenheit is the maximum temperature. This temperature limit is established to prevent degradation of the gypsum material, which can occur at higher temperatures. Exceeding this limit can lead to issues such as warping, loss of structural strength, and the potential for off-gassing, which can negatively affect indoor air quality.

Understanding this temperature limit is essential for compliance with building codes and standards, as well as for ensuring the longevity and safety of the materials used in HVAC systems. Recognizing the appropriate usage conditions helps in making informed decisions when selecting materials for specific applications, especially in environments subject to elevated temperatures.