The aluminum annealing furnace can be provided with electrical heating system through strip type heating elements located along with the sidewalls of the furnace. The heating elements of the furnace are suitably divided into number of heating zones with each zone of having their bank of heater cartridges. Each bank heater cartridges shall be connected either in STAR/DELTA or Parallel STAR/DELTA groups to have minimum number of heaters per phase per group so that the heater of groups can be isolated, without switching off the furnace in case they need replacement.
As an alternate to fuel fired heating system, the furnaces are fired with high efficiency burners supported by a full complement of combustion system consisting of combustion fan, atomizing fan, oil heating and pumping systems and/or gas trains. In addition auto ignition, flame failure safety and complete control systems are offered. Practically any type of liquid or gaseous fuel can be used viz. Light Diesel Oil, LPG, Natural Gas singly or a combination of any oil or gas in case of dual fired furnaces.