Bill Gates Is Backing a New Window Design for Buildings
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Windows are an easy way to keep buildings cool — but they could be better at doing the reverse. A company partially backed by Bill Gates' Breakthrough Energy Ventures believes it has a solution. LuxWall The Ypsilanti, Michigan-based startup says its design, which consists of two vacuum-insulated coated glass panes, can retain heat four times more effectively than single-pane windows. Breakthrough Energy and Prelude Ventures, both early investors, recently joined Khosla Ventures in a $33 million Series A funding round, led by VC firm 2150, that puts the startup's valuation at $101 million. Buildings account for 30% of global energy consumption, according to the International Energy Agency. That has prompted cities such as New York and Vancouver to pass legislation limiting e...