Has anyone use the super energy efficient windows by Serious Materials. They appear to have some very low u-values. Haven't seen any information on their DP rating.
Arthur Wood
CADD Manager
EH Danson Associates
St. Johnbury, Vermont
That's a serious R value (11.1) They seem to use three layers of film inside the cavity to achieve this. I guess there must be a serious purchase cost involved here! Interesting stuff!