<http://schema.org/description>
"Researchers at Guardian Industries have recently unveiled a new breed of vacuum-glazed super glass with an incredible R12-R13 insulation rating. For those of you who know nothing about R-value (the standard construction measurement of how insulating a material"^^<http://www.w3.org/2001/XMLSchema#string>
<http://inhabitat.com/guardian-develops-hyper-insulating-vacuum-glass/>