Abstract: This invention pertains to a fuel saving system capable of use in connection with boilers and furnaces of various types employed in a large variety of commercial, industrial and domestic equipments. According to the invention, a plurality of tubes is located around the burner of the boiler in such a manner that air projected from the tubes arrives at the heart of the full flame. Air is projected into the tubes from a blower connected with a wind box of a separate blower which is connected with a regulatable damper and a duct. Lower tubes supply superheated air to the bottom of the flame in the combustion chamber creating a turbulent premixed flame.