What is SECONDARY air?

Secondary air refers to the additional air supplied to the combustion process, which is crucial for achieving complete combustion. This air mixes with the combustion gases at the point of ignition, allowing for more efficient burning of the fuel. The primary purpose of introducing secondary air is to enhance the combustion efficiency and reduce emissions by ensuring that all of the fuel is burned thoroughly.

In heating systems that employ gas or oil, the combustion process requires a precise balance of fuel and air for optimal performance. When secondary air is introduced at the ignition point, it helps to ensure that any fuel that has not fully mixed or burned is provided with the necessary oxygen for combustion. This is vital in maintaining the efficiency of the heating system and preventing issues like incomplete combustion, which can lead to increased carbon monoxide production.

Understanding the role of secondary air is important for maintaining and troubleshooting heating systems, as improper mixing of air and fuel can lead to reduced heater performance and safety hazards.