Going Concerns Unlimited specializes in designing
  Subterranean Heating and Cooling Systems 
for solar greenhouses. 

learn | read | listen  in | locate | talk | video

GCU keeps the Photo Tours coming by supporting
  the development of Hobbit House 
You can too !!

Supplying free and low cost consulting services for the sustainably inclined home and land owner since 1976:

• Greenhouse Structures and Solar Heating

• Natural Building

• Permaculture Systems

• Energy Conservation

GCU Works by MrHobbit are licensed under a Creative Commons Attribution-Share Alike 3.0 License.
Based on the work delivered free of charge at www.goingconcerns.com.
Permissions beyond the scope of this license may be available via inquiry.