Fuel-based heating refers to systems that use various fuels, such as natural gas, oil, propane, or wood, to generate heat for residential or commercial spaces. These systems typically involve a furnace or boiler that burns the fuel to produce warm air or hot water, which is then distributed throughout the building. This type of heating is common in many regions, especially where electricity costs are high or where fuel sources are readily available. Efficiency and environmental impact can vary based on the type of fuel used and the technology of the heating system, making it important for users to consider their options carefully.