HaanGlas VIG glass provides exceptional energy efficiency without compromising the view, thanks to tiny spaces that are virtually undetectable in order to separate the panes and ensure structural integrity even under the pressure of atmospheric air. Hybrid VIG windows provide superior insulation over the gas-filled cavity used in conventional DGUs which helps reduce the heating and U-values but still retaining their attractive characteristics. Hybrid VIG windows can be retrofitted to older windows to improve energy efficiency, without changing their appearance. If you visit this website for more information, you'll find more High efficiency glass on the web.