Cost to replace windows with double pane A double-glazed window, identical of which is low-emission, is heartier than a triple-glazed window according to the basic parameter "thermal transmittance." The higher the value, the preferably the construction protects from the cold.
Thermal insulation characteristics of the window units with the conventional glass components are given in the flatland below. You can look over more details regarding the thermal insulation properties of the insulating mirror units at the following link: thermal insulation of insulating glass units.