Our new boilers ensure that heating and hot water are available to whenever you need them modern boilers are highly efficient and there is no need to wait for boilers to heat up. Is a registered company in england. We're gradually migrating away from cobol: 28%. In addition, boilers can heat up. Dependent on the size of your house, combi boilers prices will differ the more rooms and the more radiators you have, the bigger combi boiler output will be required.