The GTS PMB series of Premix Gas Tunnel Burners consist of a specially designed burner nozzle orifice and refractory burner block which provide reliable flame retention at various mixture pressures with higher heat release. These burners are more efficient than atmospheric burners as greater control is available over the air and gas mix and a hotter flame is produced. Our Premix Tunnel Burners have a shorter flame length and the air/gas ratio is easier to control and also generally easier to set up.