Glass allows direct heat radiation from the sun to pass through it, known as ‘solar gain’. This has the potential to make rooms uncomfortably hot. This is often the case in south-facing elevations. This may mean that air conditioning is necessary to cool rooms, often at great expense.
what is this?
Solar Control involves a standard float glass with a special solar coating applied. The coating is positioned to the inside of the outside pane of a sealed unit in a similar way to low e products. The coating in effect reflects the heat back, preventing it from entering the room. Solar control coatings can be combined with low e coatings and offer dual function of solar control and low e in the same double-glazed unit.
One measures the solar gain in g-values. Furthermore, the lower this number is, the better the solar control performance of the glazing. For example, 0.34 means that the amount of solar gain is 34% or alternatively, is blocking 66% of the solar radiation.
