From: bodhiSoma 
Newsgroups: misc.consumers.house
Subject: Re: Expected Cost Savings with Window Insulation Kits
Date: Thu, 29 Nov 2007 10:41:43 -0800 (PST)
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On Nov 29, 1:18 pm, Bert Hyman  wrote:
> 3M claims that their films "[increase] the R-value of single pane
> window by 90%."

Thanks Bert, that does help.  It sounds to me like adding the film is
giving me roughly 90% of the cost savings of adding another pane of
glass.  That should be substantial.

Jason