The length of time that a central heating system should last without any need for repairs or replacements is usually around 15 years. This is the length of time that your boiler should last without becoming faulty. Many other aspects of your central heating system can last much longer, including radiators and pipes.
As with most things, good maintenance can extend the lifespan of your central heating system for much longer. Home Assist has a range of maintenance plans that include an annual service to keep your boilers, pipes and radiators in good working order.