If you know that you should be having a gas boiler regularly serviced, then it makes sense to learn how often you should be doing it in the first place. You need your gas boiler to be running safely and efficiently and that means servicing it at least once per year. Without the right boiler service, you could end up with more faults, bigger bills and a warranty being null and void. Gas and oil boilers rely on you servicing them to keep them in the best possible condition. You want a qualified and expert engineer to look at the unit and ensure that it’s running as well as it possibly can.