Sustainable Lake Living

"Ventanas al Cielo" - Windows to Heaven


Here is a list of our favorite links about building our sustainable lake home. We hope this list helps you research home building, net-zero energy or evaluating any of our key partners that are helping make this dream a reality. If you have suggestions about other sites to include, send email to:

Whether you’re thinking about remodeling your house or just looking for some easy and cheap ways to save energy, you’ve come to the right place. Improving the energy efficiency of your home can save you money, help the environment, and improve your comfort. Use the links on this page to find out more.

Southface is a nonprofit organization that for more than 30 years has promoted energy-, water- and resource-efficient workplaces, homes and communities throughout the Southeast.


Established in 1954, the nonprofit American Solar Energy Society (ASES) is the nation’s leading association of solar professionals & advocates. Our mission is to inspire an era of energy innovation and speed the transition to a sustainable energy economy. We advance education, research and policy.

Developed in 1999 by the Greater Atlanta Home Builders Association and Southface, EarthCraft is the Southeast’s standard for green building, pairing building science with regional know-how. The result? Exquisitely designed and renovated homes, buildings and communities. Come explore our site, and learn about all that EarthCraft has to offer, whether you’re a building industry professional or a customer looking for a new home!

The Home Energy Rating System (HERS) is a tool used in green building construction, as well as in home energy auditing and certification programs. It is a relative scale that measures a home's energy efficiency and performance, as compared to other homes. The HERS Index scale ranges from zero to 150, and the lower a home’s HERS Index, the more energy efficient it is. A zero indicates ideal energy performance, while a 150 indicates poor energy performance. A typical existing home will generally achieve a HERS Index of about a 130, and a standard code-built home will achieve about a 100. EarthCraft homes must perform 15 percent better than code, obtaining a HERS Index of 85 or less.

GREAT NEWS - Ventanas al Cielo was independently rated at 27 !! The Green Home at Serenbe achieved a rating of 45.