The Gas Fired Oven is a direct radiant baking unit. The energy source is placed inside the baking chamber and, depending on the fuel used, direct-fired ovens may use gas (e.g., natural gas, propane, butane, liquid petroleum gas), oil, or electricity. Gas Fired Oven is an oven that uses propane gas or natural gas to cook pizza. This type of oven is very popular because it is easy to use, it heats up quickly, allowing for preheating time and the cleanup is a breeze.