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The Department of Energy has released new criteria for Energy Star windows and doors. According to the new criteria, the climate region map has been changed so that climate region boundaries generally follow the 2000 and 6000 Heating Degree Day…

If the U.S. Congress adopts an energy bill this year or next, it may well provide tax credits for using high-performance windows and other energy-saving products in new and existing homes.

Nippon Sheet Glass, a large Japanese manufacturer, has increased its holding in Pilkington, the UK glass group, from 10 to 21 per cent over the past fortnight, but has ruled out mounting a full bid.