Guy who did some tests
http://www.builditsolar.com/Projects/Conservation/bubblewrapperformance.htm
My claim here that placing bubble wrap on a single pane window results in an efficiency gain somewhere between untreated window, and a cheap thermopane seems pretty obvious. What I meant was that the results of my not-too-scientific study were that numbers seemed to post in the center between an entirely different thermopane window, and the untreated single pane window.
