Conventional boilers, also known as traditional boilers, are heating systems that use water to provide warmth to homes and buildings. They work by heating water in a large tank and then distributing it through pipes to radiators or underfloor heating systems. This type of boiler is often fueled by natural gas, oil, or electricity, making it versatile for different energy sources. These boilers are typically larger and require more space than modern alternatives, such as combi boilers. While they can be efficient, they may take longer to heat water and can lead to higher energy bills if not properly maintained. Regular servicing is essential to ensure optimal performance.