Which material is mentioned in the qualifications of designing plenums that has temperature limitations?

Gypsum board is recognized for its fire-resistant properties and structural capabilities, making it suitable for constructing plenums, which are spaces that distribute heating, ventilation, and air conditioning (HVAC) systems. When considering the qualifications for designing plenums, one must take into account the material’s temperature limitations. Gypsum board can withstand certain temperature ranges, but it also has a maximum temperature allowance, beyond which its integrity can be compromised.

This temperature limitation is critical because, in an HVAC system, air temperatures can fluctuate significantly, especially in systems that combine heating and cooling functions. If the air temperature exceeds the allowable limit for gypsum board, it can lead to degradation, structural failure, or even safety hazards within the plenum.

Plywood and fiberglass may also be used in plenum applications, but they have different fire ratings and temperature limitations that make gypsum board a more favorable choice in many situations. Metal, while durable and able to withstand high temperatures, does not provide the same level of fire resistance as gypsum board in specific applications. Therefore, understanding the temperature limitations of these materials is essential for ensuring safe and effective design in HVAC applications.