Radiator balancing ensures that the amount of hot water flowing through each radiator in a central heating system is evenly distributed. When a central heating system is unbalanced, some radiators may heat up too quickly or not at all, while others may remain lukewarm. This not only reduces the efficiency of the heating system but can also result in higher energy bills. Balancing the radiators, the hot water is distributed evenly throughout the system, ensuring that each radiator heats up at the same rate. This can help optimise the heating system's efficiency and reduce energy consumption, leading to lower energy bills.