downtheroad wrote:
Here is a decent article re: this discussion. Seems that the "fogging window failure" issue is more of a problem in trailers that don't have the same suspension that motor homes have. Trailers ride rougher, vibrate and flex more which is the reason for failure.
Dual Pane - Single Pane Article...HERE
I had a Phaeton motor home before my present 5th wheel. The motor home took 2years to fog up and the trailer took one year. I travel about 10,000 mile per year. I talked to Tiffin about the motor home after it cost me $1200 to repair, and Tiffin helped defray some of the cost. Also Tiffin claims they have spent considerable money in research to make the windows with stand travel. They are better for motor homes, but they are still a weak link and are still costing the customer too much money for repair.
It makes no economic sense to install double pain windows and they are simply another way for RV manufacturers to make more profit. The initial cost of this option is expensive and it very doubtful one will make up the savings in fuel costs. And if they need repair it is even worse. In short park in the shade on hot days and use slightly more fuel on cold days while parking in the sun. You will have less aggravation.