"Triple pane" refers to a type of window or glass that has three layers of glass, which helps to provide better insulation and soundproofing for your home or building. Full definition
For instance, the Pacific Northwest National Laboratory paid $ 6,243 for 196 square feet of highly efficient triple pane windows in 2013, and found that they led to a 12 percent energy bill savings — but that it would take many years to totally recoup the dollar cost of the windows. (washingtonpost.com)
The U-value is achieved through the use of triple panes of glass. (elrondburrell.com)
Make suggestions to significantly increase the amount of insulation, all new triple pane windows, add skylights for daylight harvesting. (energyvanguard.com)