Gas fired ovens that only Gas fuel for cooking to maintain the temperature
with fuel efficiency. Food is cooked in that same chamber while the fire is still going,
or in the heated chamber after the fire. Such ovens became popular
in the Restaurant use in bakeries and pizzerias, The most common method is the
fire bricks & pizza stone, which stores heat while the oven is preheating
and transmits it directly to the bottom of the pizza.