In winter, the indoor temperature is higher than the outdoor temperature, and far-infrared heat radiation mainly comes from indoors. LOW-E glass can reflect it back into the room to keep the indoor heat from leaking out. For part of the solar radiation from the outdoors, LOW-E glass can still allow it to enter the room. This part of the energy is absorbed by indoor objects and then converted into far-infrared heat radiation and remains indoors.

In summer, when the outdoor temperature is higher than indoors, far-infrared heat radiation mainly comes from outside the city. Low-e glass can reflect it out to prevent heat from entering the room. For solar radiation from outdoors, you can choose LOW-E glass with a low shading coefficient to limit its entry into the room, thereby reducing certain costs (air conditioning costs).

2. What is the role of argon filling in LOW-E insulating glass?

Argon is an inert gas with poorer heat transfer properties than air, so filling it into insulating glass can reduce the U-value of insulating glass and increase the thermal insulation of insulating glass. For LOW-E insulating glass, argon also has the function of protecting the LOW-E film layer.

3. How much UV rays can LOW-E glass attenuate?

Compared with ordinary single-piece transparent glass, LOW-E glass can reduce ultraviolet rays by 25%. Compared with heat-reflective coated glass, LOW-E glass can reduce UV rays by 14%.

4. Which surface of the insulating glass is suitable for the LOW-E film layer to be located on?

The insulating glass has 4 surfaces, numbered from the outside to the inside are 1#, 2#, 3#, and 4# surfaces respectively. In areas where the heating demand exceeds the cooling demand (northern region), the LOW-E film layer should be on the 3rd surface. On the contrary, in areas where the cooling demand exceeds the heating demand (southern region), the LOW-E film layer should be located on the 2nd surface.

5. How long does the LOW-E film last?

The duration of the coating layer is the same as the duration of the sealing of the insulating glass space layer.

6. How to determine whether the insulating glass is coated with LOW-E film?

Monitoring and identification can be carried out according to the following steps:

A. Observe the four images presented in the glass (in other words, there are 4 beams of flames and 4 object images).

B. Place a match or bright object in front of the window (whether you are in the city or outdoors). If it is LOW-E glass, the color of one image is different from the other three images. If the colors of the four images are the same, it can be determined. LOW-E glass is not installed.