I a 2day course in water service works and pass a
I) a 2-day course in water service works, and pass a writtten examination conducted by pub. Get the comfort you need at a price you can afford! The most obvious benefit of a combi boiler is having both hot water and central heating on demand, with high responsivity to temperature and tap usage that makes them incredibly user-friendly pre-empting manual operation of central heating, as well as eliminating any waiting period for.