A process and apparatus for heating an oven using nebulized water particles and compressed air including the steps of heating water contained in reservoir that is located outside of a cooking chamber by transferring water within the reservoir through a water heater to reach a desired end point temperature that is less than boiling, heating compressed air by sending compressed air through an air heater that is submerged within the water of the reservoir, conveying the heated water and the heated compressed air to a nebulizer, nebulizing the heated water into heated water particles and introducing the heated water particles into the cooking chamber via the heated compressed air.