What type of appliances utilizes oil as fuel and needs combustion air?

Oil-fired appliances utilize oil as a fuel source for combustion, making them distinct from appliances that rely on gas or electricity. These appliances must draw in combustion air to facilitate the burning of the oil, which is crucial for achieving optimal efficiency and reducing harmful emissions. Proper ventilation is essential; without adequate combustion air, the combustion process can become incomplete, potentially leading to elevated carbon monoxide levels and other combustion-related issues.

Gas-fired appliances typically use natural gas or propane, while electric appliances rely on electrical energy and do not require combustion air since they do not involve a burning process. Solid fuel appliances, on the other hand, may use wood or other solid materials as fuel and also require combustion air but are categorically different from oil-fired appliances due to the physical state of the fuel used.