It is not enough to answer the question whether to choose double glazing or triple glazing. Although we can start here. With different combinations in the composition of insulating glass in double glazing, it is possible to achieve heat transfer UG = 1.0 W/m²·K. Which is an excellent result. However, with the triple glazing composition, this value can be reduced by half - UG = 0.5 W/m²·K. The triple glazing has up to two vacuum gaps filled with argon and air. It significantly increases the level of thermal insulation. Double glazing is an economical solution and its advantage is lower weight and higher solar gain.