The structure of Saining multi-layer plate provides an incomparable advantage for extremely cold areas. Hollow structure can provide excellent insulation performance, and suffer less heat loss than single-layer lighting material. The heat loss can be measured by the heat transfer coefficient -U value (commonly known as the K value in China), which is the heat loss value per Celsius under variable temperatures, expressed in the form of W/ M2K.

Saining multi-layer panels are installed in front or behind the existing light windows to achieve intensified heat preservation. In such installation conditions, a 20-50mm air buffer between the Saining multi-layer plate and the existing lighting window should be left, so as to get a better effect.

Extremely low U value can be obtained by combining double-layer Saining panels with multi-layer ones. For example, in the application of curved and inclined roof, the Saining sheet is used both inside and outside the roof, and an air buffer of 20-50mm is left, which will greatly reduce the heat loss.

It keeps cool in summer and warm in winter. The thermal conductivity (K value) of PC sheet is lower than that of ordinary glass and plastics, and its heat insulation effect is 7%-25% higher than that of the same glass. The green PC sheet has heat insulation rate up to 49%, so it is used for buildings with warm equipment as the heat loss is greatly reduced.

With excellent insulation performance, Saining multi-layer plate reduces the amount of cold radiation entering into the building. In winter, the lower the U value, the higher the surface temperature of internal plate. The Saining multi-layer structure creates an air buffer that maintains the surface temperature of sheet at a moderate level. Under this condition, the surface of the internal plate maintains a temperature above 0℃, so no cold radiation will enter the room.

The water droplets formed on the surface of the plate due to temperature difference will reduce the light transmittance of the sheet. The drop water drops will damage the growth of crops and destroy sophisticated machinery and equipment. There is a special coating on lower surface of the Saining anti-dew sheet, which prevents the formation of condensate water. The coating reduces the surface tension of the plate, so that water droplets only form a thin uniform film of water on the plate. According to the angle of plate installation, this thin layer of water film will flow along the surface of the plate to the drainage system instead of falling onto the ground, so the light transmittance and lighting performance of the plate will not be affected.

When the outdoor temperature is 0℃, the indoor temperature remains at 23℃; when the indoor relative humidity is lower than 80%, the inner surface of the material shows no dew coagulation .