The ER (Power Score) in Canada takes into consideration all 3 elements. Using it you'll be able to compare the vitality efficiency of various home windows. For home windows used in warm or cold areas should have an ER of 29 or above. Home windows used in cold areas should have an ER of 34 or как поставить деревянное окно в баню increased. European quality windows must be optimized for the location of the project. English sort home windows acquired such a title as a result of their popularity ac...