Following a three-home streak of LEED-Platinum awards, builder Mike McDonald found a way to let in more coastal California views without sacrificing a tight envelope: the NanaWall WA67 opening glass wall. “I am blown away by the new NanaWall system that meets Passive House standards,” McDonald says. “We try to be 50 to 60 percent better than the rigorous Title 24 energy standards out here, but when you have a lot of glass, that’s tough.” The triple-glazed panes and foam-filled frame boast a U-value of 0.17 and a solar heat gain coefficient of 0.26, giving McDonald’s 15-foot glass expanses the R-value of an insulated exterior wall.
NanaWall Systems. 800.873.5673. www.nanawall.com.
