Double Pane Windows VS Triple Pane Windows
When we are saying pane windows, we refer to the layers of glass between the window frames. A single pane means one layer of glass in the frame. Double panes mean two layers of glass and one spacer created between the glass panes, and triple panes, three layers of glass and two spacers created. By the layers, we can see triple pane windows and 1.5 times thicker and heavier than double pane windows, which is one of the major differences between them. They are also different in energy efficiency, cost, noise reduction, and security, and other aspects.
You can barely see single pane windows in the current market for they don't meet today's energy efficiency needs. You won't also see a quadruple pane window, either, for that will be too heavy and too strong, which is way too good to fit a common frame. Most people normally go for either a double pane or a triple pane window.