An intelligent reader's guide to operate and maintain a central heating system economically, efficiently, and trouble-free. Accordingly, you can benefit from repair and cost-saving. This is the complete Technical and Practical DIY manual for the homeowner, which is jargon-free technical information in easy to understand format and step-by-step simple instructions to fault find and repair if a breakdown does occur. Just reading through this manual, without handling a tool, you will learn valuable tips to make real savings on gas and repair bills, alone worth the price of the book.