FAQ

LOW-E film surface position in 2# or 3# hollow glass K value is smaller
(outside the 1# position, indoor 4# position), that is, thermal insulation
performance is better. The shading coefficient of 3# location (measuring the
total transmittance of glass to sunlight) is greater than that of 2#. This
difference is the key factor to pay attention to when using Low-E glass under
different climatic conditions. Cold weather conditions (northern region), in the
indoor insulation at the same time people want to get more heat from the sun,
the coating surface should be located at the 3# position; hot climate conditions
(South), people hope that the solar radiation heat into the interior of the
less, the coating surface should be located at the 2# position.
The appearance of LOW-E films at different surfaces is very different (the
color effect of different types of Low-E glass is very different). In general,
the appearance effect of the LOW-E film in the 2# position has the texture of
the coated glass, while the 3# position is not. Manufacturers generally pay
attention to control the color of the glass surface in production, that is, the
appearance of the LOW-E film in the 2# position. Therefore, when determining the
position of the LOW-E film surface, it should be selected according to the
customer's preference. It is suggested that the user who pays attention to the
appearance effect should choose the LOW-E hollow in the 2# position.
The other configuration that European and American designers like to choose
is that the outer pieces of the hollow glass are coated with heat reflective
coating glass, and the inner pieces use the colorless LOW-E glass. In fact, this
habit is formed by historical reasons, because there are almost no other LOW-E
glass in other colors at the early stage, which can only pursue the appearance
decoration effect in this way.