The ideal temperature for a boiler depends on several factors, such as personal preference, weather, and hot water needs. However, it is recommended to maintain the boiler temperature within a specific range to prevent issues such as overheating. The recommended temperature range for a boiler is typically between 120-160 degrees Fahrenheit for low-temperature settings and 180-200 degrees Fahrenheit for high-temperature settings. During the summer, lower boiler temperatures are more efficient and comfortable, while higher boiler temperatures are more suitable for the winter. It is best to adjust the boiler temperature settings based on the fluctuations of the weather. If the temperature goes over 212 degrees Fahrenheit, the boiler will start to overheat, which can cause the boiler to leak or burst. The temperature settings for hot water cylinders normally stay within the same range throughout the year, and the ideal temperature for a hot water cylinder ranges between 140-150 degrees Fahrenheit. It is also possible to use smart temperature controls that automatically adjust the homes temperature.