How must air ducts formed by gypsum boards be treated within air-handling systems?

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Air ducts formed by gypsum boards within air-handling systems must not be incorporated with evaporative coolers due to the potential for water damage and structural integrity concerns. Gypsum board is hygroscopic, meaning it can absorb moisture, which poses a risk when combined with systems that operate via evaporation, as these systems can introduce significant humidity levels into the air. This moisture can lead to the deterioration of the gypsum material, promoting mold growth and compromising the functionality of the duct system.

Proper treatment of air ducts in HVAC applications is critical to ensure system efficiency and longevity. Using gypsum boards in an application where moisture levels are high, such as in evaporative cooling, can lead to issues like warping, reduced insulation values, and even air quality concerns. Therefore, the correct stance is to avoid incorporating gypsum board ducts with evaporative coolers, ensuring that the duct material and the system design remain compatible for optimal performance and safety.

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