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Submitted by Martin Holladay, GBA Advisor on Fri, 04/30/2010 - 05:20
Sub Title: 
Deep Energy Retrofits
Teaser Text: 

Do deep-energy-retrofits cost more than a big PV array?

Promoted Node: 
Energy-Efficiency Retrofits: Insulation or Solar Power?
Image: 
Installing spray polyurethane foam as part of a deep-energy retrofit
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