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In-depth articles on topics related to improvement, care, and maintenance.

Online resource center for commercial and industrial boiler operators and engineers.

Illustrated tutorial on fabricating sheet metal ductwork.

Advice from a service manager on buying a new unit, illustrated essay on chimney liners, and a history of brand names.

HowStuffWorks explains thousands of topics, from engines to lock-picking to ESP, with video and illustrations so you can learn how everything works.

The University of Southern California is one of the world's leading private research universities, located in the heart of Los Angeles.

Whether remodeling your kitchen, dreaming of a master bathroom addition or simply repairing a leaky faucet, DIY Network's expert give you step-by-step instructions ...

Technical support and regulatory updates; articles, faq, and news.