What is the maximum allowable temperature for air flowing through HVAC ducts?

The maximum allowable temperature for air flowing through HVAC ducts is 200°F. This standard is in place to ensure the safety and integrity of the ductwork as well as the efficiency of the HVAC system. At higher temperatures, materials used in duct construction, such as galvanized steel, aluminum, or fiberglass, can be compromised, leading to potential damage or failure of the duct system.

Maintaining air temperatures below this threshold helps prevent issues such as thermal expansion or contraction, which can weaken joints and seals. Additionally, exceeding the maximum temperature can negatively impact the energy efficiency of the system and potentially create uncomfortable conditions in living spaces or commercial areas. Overall, keeping the air temperature within this guideline helps ensure the system operates safely and effectively.