Noun

(en noun)

An insulated glazing unit.

*{{quote-news, year=2007, date=May 20, author=Mark Svenvold, title=The Zero-Energy Solution, work=New York Times citation

, passage=There was nothing odd, or futuristic, or exotically “eco” about the house — no solar panels to be seen, no giant arrays of thermopane windows passively drinking up light and heat; yet here, I’d been told, in the Sourland Mountains in New Jersey, an hour from Manhattan, was a house that had the potential — not long from now, not 20 years from now, but maybe within 5 to 10 years — to help turn millions of American homes into fully self-sustaining power plants, each one capable of producing hydrogen to fuel cars as well. }}