1980 - Volume #4, Issue #1, Page #29
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Insulated Shade Cuts Heating Costs
"It eliminates 79% of heat loss through single glazed windows, and reduces heating costs by as much as 50%," reports Pam Mosher, of Appropriate Technology, manufacturer of the new ATC Window Quilt.
Applied to single-glazed windows, it increases their "R" value from .9 to 4.5, resulting in a 79% reduction of heat ..........


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1980 - Volume #4, Issue #1