Saving Windows, Saving Money – a newly published report on energy performance of windows. The report analyzes do-it-yourself solutions such as window films and weather stripping to replacing older windows with new ones.
This NEW study builds on previous research and examines window options comparing the relative energy, carbon, and cost savings in various climate regions.
Click here for the new 2012 Energy Performance Window Report
Here is a link to the same report. The difference is that besides this report, there are separate links and downloads which go into more detail. Check it window energy performance here .