What is the maximum temperature of air blowing from a furnace?

The maximum temperature of air blowing from a furnace is most commonly accepted to be around 200°F. This temperature limit is primarily based on safety standards to prevent potential hazards such as burns and damage to the ductwork or other materials in contact with the heated air. It's essential to maintain this temperature threshold to ensure the longevity of the HVAC system and to avoid compromising indoor air quality.

While other options may reflect certain conditions or specific types of furnaces, 200°F is generally acknowledged as a safe upper limit for standard residential systems. Operating at temperatures above this limit could lead to issues such as overheating of the furnace components or causing discomfort to occupants within the living space. Additionally, exceeding this temperature can increase the risks associated with combustion appliances, including the potential for carbon monoxide production or structural damage to the home.

Understanding these safety parameters is crucial for building inspectors, as it helps ensure compliance with building codes and standards that protect both property and occupant health.