heat transfer coefficient (U) the whole window is a parameter which should be borne in mind when deciding to purchase and install energy-efficient doors and windows. It depends on the heat transfer coefficient of the frame (UF), the so-called values. and the coefficient of thermal bridge insulation windows (UOS).
Since it is the glass is the highest percentage of window surface, then this element is the most important influence on the level of thermal insulation around the windows.
Remaining on the topic of windows, you might want to raise yet another issue important to users - a steamed up window. This phenomenon is usually observed during spring and autumn. It binds with higher humidity and higher temperature differences inside and outside. In any event, no evidence of a defect in either windows or a window.
It also happens that moisture appears only locally, in the form of spots on the inner surfaces of columns, window frames, which in winter may even overlap with frost. Then we have the so-called. thermal bridge, which is usually caused by interruption of the insulating layer connection with the wall of windows or break the layer of material used to warm the house.
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