7 or 10 years, best of luck trying to making a claim on that one!!
Why do people believe that something that cost under £800 to buy & probably a few hundred to build, then you have the supply chain taking there cut every time, will have enough profit in it to be able to send out an engineer to repair/replace it in 5 years time let alone 10.
It is one big con.
Even the premium brands now regularly refuse an electrical fault claim with the word the system is dirty or not been serviced within 12 months.