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Furnaces and energy savings
There are many good articles online about new energy-efficient furnaces, in addition to those found in the Our Sources section of this report.
Carrier offers a not-too-technical comprehensive glossary of HVAC terminology.
The Department of Energy lists federal tax credits, including incentives for energy-efficient HVAC systems.
The Energy Star site run by the Department of Energy and the Environmental Protection Agency has information about other credits and rebates available for upgrading to energy-efficient home appliances. It also has a tool to help you find furnaces that meet Energy Star efficiency criteria.
The Air Conditioning Contractors of America sets standards for furnace installation. Their consumer information page offers tips on installing a new system, choosing a contractor and maintaining an existing system. There is also a link to information about tax credits for high-efficiency equipment.
The North American Technician Excellence association has information on installing and maintaining equipment and saving energy. There is also a tool for finding NATE-certified HVAC installers in your area.
A news release by the American Council for an Energy-Efficient Economy, "U.S. DOE Heats Up New Energy Standards for Home Furnaces," discusses a new efficiency standard for home furnaces under consideration by the Department of Energy.
HGTVPro.com explains how multistage furnaces work and discusses factors to consider when installing one.
The Sheet Metal and Air Conditioning Contractors' National Association maintains an online contractor directory.
ContractorTalk.com hosts a forum for professionals that includes useful info for homeowners as well.
Better Homes and Gardens offers maintenance and troubleshooting advice for furnaces.
Bob Formisano, the About.com guide to home repair, offers a basic gas furnace troubleshooting and repair guide. (Note: ConsumerSearch is owned by About.com, but the two don't share an editorial affiliation.)