Which type of gas burns with a blue flame indicating efficient combustion?

Natural gas is known for burning with a blue flame, which indicates efficient combustion. The blue flame signifies that the gas is burning completely with adequate air supply, leading to proper mixing of fuel and oxygen. This results in a more complete combustion process, minimizing the production of carbon monoxide and other harmful byproducts.

In contrast, other types of fuel may produce a yellow or orange flame, indicative of incomplete combustion, which can occur due to insufficient oxygen. This can lead to the formation of soot and carbon monoxide. The efficiency of natural gas as a fuel source, along with its cleaner-burning qualities, makes it a preferred choice in many residential and commercial applications. Understanding flame color can help technicians assess appliance performance and ensure safe operation.