The S plan Heating system is a modified version of the Y plan heating system and is the most common type of heating system used in domestic properties in the UK. The S plan system uses two motorised valves to control the flow of hot water from the boiler to either the central heating system, the domestic hot water system, or both systems simultaneously. Each valve is controlled independently by a separate thermostat and timer, allowing for greater flexibility and control over the heating and hot water systems. This means that homeowners can choose to heat their home and provide hot water at different times of the day, depending on their needs and preferences.

The S plan system is typically more efficient than the Y plan system, as it allows for greater control over the heating and hot water systems. This can lead to energy savings and lower heating bills for homeowners. Additionally, the S plan system is often easier to install and maintain than other types of heating systems, making it a popular choice for both homeowners and heating engineers.

Overall, the S plan heating system is a reliable and efficient way to provide heating and hot water in domestic properties, and its popularity is likely to continue in the years to come.

Overall, the S plan heating system is a popular choice for domestic properties in the UK due to its flexibility, efficiency, and ease of installation and maintenance.

Note: The image to the right is for illustration purposes only and may not represent the exact configuration of every S plan heating system.