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About this Book Central heating is a cost effective method to warming up the entire interior of a home or commercial building from a local heat generating unit. These units run on various types of fuels depending on your energy needs. The heat is then typically distributed using air ducts, or by feeding hot water or steam through pipes. In this book we provide you with everything you need to know about how they work, the different types of central heating systems and common malfunctions and how to locate a qualified central heating engineer when you need to.