Save up to % by comparing quotes from our suppliers! Combi boilers (or combination boilers) are the most popular option for most homes in the uk there is no need for a hot water cylinder or tank. Read what mners think of the new mumsnet mattresses available at dreams! If you see a public highway grid or drain is blocked then you can let us know about it by using this online form. Our guide to boiler installation prices will make sure you know what to expect to pay, so you don't end up paying over.