A combi (or combination) boiler produces both heating and hot water from one appliance. No additional hot water cylinder is required and the hot water produced by combis is sent to your taps at mains pressure. These features make combi appliances an attractive proposition, especially when space is at a premium within the home. You would normally save money and time on the installation of a combi too, as there is less additional components to install.
Grant supply both internal and external combi oil boilers - discover more here.