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Blinds roll down, swing out for extra shade.

South-facing windows warm this ranchstyle house through the winter. But in summer, when the sun climbs to a higher angle, three vinyl shades unroll to extend the shady buffer zone provided by 7-foot eaves, Designer John Krause, of Palm Desert, California, came up with this passive cooling strategy to improve upon the year-round efficiencies of a house design already well suited to areas where summers are hot.

Widely available at home improvement centers, the vinyl strip blinds let some light through but reflect heat. They're also inexpensive (about $10 each for these 72- by 80-inch units, including shade mounts and cord hardware).

Krause mounted the blinds along the eaves. For stability (and easy rolling and unrolling), each shade was attached to a weighted winding spool--a 2-by-2 plus two lengths of '/4-inch angle iron 1-1/2 inches longer than the shade's width. Holding the angle irons snugly around opposite edges of the 2-by-2 (see diagram), Krause wound the bottom end of the shade tightly around the spool once, and stapled the shade to the 2-by-2.

Support poles are lengths of 1-inch schedule 40 PVC pipe that are installed to pivot a few inches above the patio floor. To let the poles pivot freely at both top and bottom, the screw holes were drilled slightly larger than the #10 screws that make the connections.
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Copyright 1988 Gale, Cengage Learning. All rights reserved.

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Publication:Sunset
Date:Aug 1, 1988
Words:222
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