Oregon has a refund program run by an organization named the Energy Trus. They give rebates based on insullation measures taken on homes. They have recently lowered these U - values from a .32 to qualify to a .30. Now I ask you this, what kind of dif will this make in a temperate climate such as the Pacific NW?? The money spent to get the windows to qualify will be a wash for what you can qualify in return on the rebate, not to mention the extremely low return on investment that this diff. will make. Does anybody else have the problem in their local areas, or is it just Oregon? They do boast about being the most "green" organization and the most strict.
Generally most areas require a .35 rating for the rebates. Some states require .35 or less in order to be sold or installed in a living area. There are windows on the market with ratings as good as .18. Before people cared about the ratings most double panes were aound a .50.