Gas Heating System

Gas heating units (Furnace) have a switcher from heat to indirect fire that uses gas supplying as source of energy. To provide heating, a spark turns on along with a gas valve turn on a flame that flows through a pipe that could be made of aluminized steel or stainless steel. Fire never comes in contact with the air (that is why its named indirect fire). Heating capacity of this units is measured in MBH (Thousand BTUs per hour).