R-Values of Double, Triple, and Quadruple pane windows
Regular double pane window R value (no LowE panes): 2Regular triple pane windows R value (no LowE panes): 3.5
Regular quadruple pane windows R value (no LowE panes): 4
Double pane windows with 1 LowE, Argon fill R value: 3.2 – 3.5
Modern Double pane, Argon fill R value: 3.7 – 4
Triple pane with 1 LowE, Argon fill R value: 5 – 5.5
Triple pane with 2 LowE, Argon fill R value: 8 – 8.7
Triple pane with 2 LowE, Crypton fill R value: 8.5 – 9.7
Quadruple pane with 2 LowE, Crypton fill R value: 10 – 12
Quadruple pane with 3 LowE, Crypton fill R value: 10 – 12
