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Please forgive my ignorance on this.  A new window just arrived that I ordered to replace a damaged one in my new house.  It has a green film on it which I understand is energy saving; it blocks heat from going in or out. What happened to passive solar? This is a south facing window. It never gets too hot so I'm not worried about too much heat getting in in the summer. Even though it will keep in the furnace heat in the winter won't I be missing out on a lot of heat from the source itself??? 

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Comment by Aylee Welch on August 29, 2011 at 1:29pm
Thanks.  I found out that there is a lot of controversy about the one-size-fits all codes we have for windows since they tend to have low E (ultra violet) allowances but also low "SGHC" solar heat co-efficiency which doesn't work for us here in the north.  I am going to pay more for a non-code window that has none of it.  it seems like my only choice right now.  I can't wait to be done with all of this contractor stuff for awhile!
Comment by Susan Gregory on August 25, 2011 at 9:50pm
Joel thinks the green film is meant to be peeled off-   there is a clear film in between the layers of glass that you can't see. In the winter this window should let heat in, in the summer it should reflect heat away.  Hope that helps!

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