The thermal transmission allows you to evaluate the thermal insulation of the glass between environments of different temperatures.
The Thermal Transmittance Coefficient (U) is defined as "the amount of energy transmitted per hour through a glass with an area of 1 m2, when the temperature difference between the outside and inside air is 1°C" (Saint Gobain, 2019).
The smaller the U, the lower the energy loss and the greater the thermal insulation of the glass.
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