Low-E coatings are designed to block radiant energy but allow solar and light energy to pass through the lass. This energy-saving technology first became available in 1979 and continues to grow in popularity. Low E oatings were primarily designed to improve window performance in cold climate conditions, however this same coating mildly supports window performance in hot climate regions. Windows treated with Low-E coatings are proven to reduce energy consumption, decrease fading of fabrics, such as window treatments.
And the advantage of low-E are:
6mm clear | 12mm air gap | 6mm Clear. As a result 54% ultraviolet light and solar heat pass through the glass. There is also a high heat loss in winter.
6mm clear | 12mm air gap | 6mm low e. As a result 68% ultraviolet light and solar heat pass through the glass. There is Medium heat loss in winter.