Our single pane windows sure radiate a lot of cold in the winter. We have to use aftermarket film to cover them to keep the cold from getting in and the heat from getting out (yes, I understand heat and the absence of heat but am describing how it feels).
If we were to order a Montana again it would beyond a doubt have the dual pane windows. Doug says he is almost sorry he didn't get them but we are *very* sorry we didn't order them.
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