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I think dual pane windows will be more efective than single pane under any circumstances..If you need them. That they provide data for their other windows makes me wonder if maybe Keystone did not want the numbers. Don't have them, can't publish them and the consumer can't evaluate.Would not be surprised to find the same windows on other brand campers as well. Can you tell that my opinion of dual pane windows on a RV is not very high.But...that you are satisfied with them is all that matters.
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