What is the maximum temperature for using gypsum board to form plenums?

The correct maximum temperature for using gypsum board to form plenums is 125 degrees. Gypsum board is selected for its fire-resistant properties and is commonly used in constructing ceilings and walls of mechanical spaces, including plenums. However, gypsum board is not designed to withstand high temperatures for extended periods. Anything above 125 degrees can compromise its integrity and fire resistance, potentially leading to structural failure or increased fire risk.

This specific temperature threshold ensures that installations remain safe and effective, complying with building codes and fire safety standards. Plenums, which are spaces used to circulate air, can reach elevated temperatures, especially in HVAC applications, and it is vital to maintain the temperature within safe limits to ensure the longevity of the materials used and the safety of the occupants.