VOLume 25, NO. 1 JaNuary/February 2011 sOLartOday.Org
FRed ReaRdon, WhiRLWind SoLaRhudSon vaLLey cLean eneRgy
Copyright © 2011 by the American Solar Energy Society Inc. All rights reserved.
ON THE COVER: Though the Passivhaus strategy is custom-fit for cold
climates, architect Corey Saft, with Katrin Klingenberg of the Passive House In-
stitute US, modified it for hot, humid Lafayette, La. The result is the South’s first
certified Passive House (as it is spelled in the United States). Photo by Robin L. May
Articles appearing in this magazine are indexed in Environmental Periodicals Bibliography and ArchiText Construction Index: afsonl.com.
22 CasE s Tudy | Passive House,
By Lynne Clearfield
The South’s first house certified to the rigorous conservation standard adapts a model proven in Germany to
28 Storing Summer Heat
By Dave Stets with Jim McLeskey and Marshall Sweet
Based on simulation results, the high-mass solar heating
system being demonstrated in Virginia will provide 70 to
80 percent of a home’s heating load.
32 Hot Water from Hot Rocks
By Seth Masia
Three American towns now have more than 80 years of
combined experience with municipal geothermal heating districts and are expanding their systems.
34gET s TaRTEd | Pay Dirt
By Xiaobing Liu, Patrick Hughes and Jeff Munk
Designing, selecting and installing a residential ground-source heat pump system.
Next Issue: Building a Solar Movement
Initiated four years ago as a kitchen-table discussion about
how to bring solar to a Washington, D.C., neighborhood, the
Mt. Pleasant Solar Cooperative recently installed its 100th
photovoltaic system. About one in 10 of this inner-city neigh-
borhood’s single-family homes now generate pollution-free
solar energy, and the group has midwifed sister co-ops in six
other D.C. neighborhoods. Co-op leaders share how interested
consumers have become a movement.