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Why is my faucet leaking, my toilet running, or my dishwasher refusing to start? Can I fix it myself? What's causing the heating system to smell bad or the foundation to crack? Do I need an air filtration system? Is the new "engineered lumber" as good as conventional wood? These are just a few examples of questions homeowners face when repairs are needed, or when a new house or addition is being planned.There's no question that it pays to be an informed consumer. Knowledge of your home's systems helps you control repair and construction costs and make sure the correct elements are being installed or replaced.This book uncovers the mysteries behind just about every major appliance and building element in your house. Clear, "exploded" drawings show you exactly how these things should be put together and how they function –  what to check if they don't work, and what you can do that might save you having to call in a professional.