Which appliances use oil as fuel and require combustion air?

Oil-fired appliances utilize oil as a fuel source and necessitate combustion air for their operation. The combustion process for these appliances involves burning oil to generate heat, and just like other combustion appliances, they must have a proper supply of combustion air to facilitate this process.

When oil is burned, it produces byproducts such as carbon dioxide and water vapor, and adequate ventilation is essential to ensure efficient and safe combustion. Proper combustion air helps maintain efficient fuel usage, reducing emissions and preventing the potential buildup of harmful gases.

In contrast, gas-fired appliances rely on natural gas or propane, electric appliances operate using electrical energy without the need for combustion or combustion air, and wood-fired appliances use wood as fuel, which also requires air for combustion but operates on a different fuel type and combustion dynamics compared to oil-fired systems. Therefore, among all the options provided, oil-fired appliances are specifically identified for using oil as fuel and requiring combustion air.