Want to know more about the nuts and bolts of energy-efficient mortgages? The Residential Energy Services Network (RESNET) Web site offers almost everything you always wanted to know about the subject. A recent addition to the site is the Financing Energy Efficiency Handbook A for Lenders. It includes an overview of energy-efficiency financing. The heart of the document is complete guidelines for secondary mortgage lenders Freddie Mac and Fannie Mae, as well as those for FHA's program. Also included is a directory of key national contact people and a glossary.

If you're looking for a lender knowledgeable about energy-efficient mortgages, RESNET's Web site offers an extensive list of mortgage lenders in 10 states: Alaska, Arkansas, California, Colorado, Indiana, Mississippi, Oregon, Utah,Vermont and Wisconsin. A number of notable names appear, including Norwest, Banc One Mortgage, Key Bank and Chase Manhattan. Home energy rating programs are also listed.

RESNET is a national consortium of builders, lenders, utilities and government agencies that promote home energy efficiency through financing and rating programs. The Web address is www.natresnet.org. You can also reach them by phone at 907-345-1930.