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From: levy@ttrdc.UUCP (Daniel R. Levy)
Newsgroups: net.consumers
Subject: Re: Energy efficient window coverings.
Message-ID: <675@ttrdc.UUCP>
Date: Tue, 7-Jan-86 19:46:58 EST
Article-I.D.: ttrdc.675
Posted: Tue Jan  7 19:46:58 1986
Date-Received: Wed, 8-Jan-86 06:21:56 EST
References: <1198@mtuxo.UUCP> <433@mhuxl.UUCP>
Organization: AT&T, Computer Systems Division, Skokie, IL
Lines: 25

In article <433@mhuxl.UUCP>, smh@mhuxl.UUCP (henning) writes:
>> Given this set up, does anyone have any recommendations as to the type
>> of window coverings we should use. To maximise heat retention in Winter
>> and minimize heat absorption in the summer. Looks are important ie we're
>> not wanting to put up silver and black coverings.
>
>Thermal indoor shutter: R-6.0 (FTR shutters) to R-2.5 (Wallrich)
>Roller shade: R-2.5 (Appropriate Technology) to R-1.5 (Solar Energy Components)
>Storm Windows: R-1.1 (sheet construction) to R-0.9 (film construction)
>Draperies and liners: R-0.9
>Standard window shades: R-0.6
>
>Note the higher the R-value the better.  Source, Consumer Reports.

Note too that even if you didn't care for looks, black coverings would not
be a good idea since they would absorb light energy and become hot during
the day in summer and would radiate away energy as infrared rays at night
in winter.  Better silver or white.
-- 
 -------------------------------    Disclaimer:  The views contained herein are
|       dan levy | yvel nad      |  my own and are not at all those of my em-
|         an engihacker @        |  ployer or the administrator of any computer
| at&t computer systems division |  upon which I may hack.
|        skokie, illinois        |
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