Difference with gas boiler

The fuel of oil-fired boilers is fuel oil (such as diesel, engine oil, kerosene, etc.), and the fuel of gas-fired boilers is gas (such as natural gas, city gas, biogas, etc.). The equipment that depends on what fuel the boiler burns is called a burner. The boiler is called a gas boiler, and the boiler equipped with an oil burner is called an oil boiler. The difference between an oil boiler and a gas boiler lies in the fuel used by the burner.