‘Solar Heat Gain Coefficient’ and how it can it save you money
The amount of solar heat that gets through a window is measured using a term called ‘Solar Heat Gain Coefficient’ (SHGC).
If you want to reduce the amount of heat coming in via your windows, then get windows with a low SHGC rating. This will help to reduce your air-conditioning cooling costs.
If you’re in a cold climate and want to increase the amount of warm winter sun that comes in, then get a window with a higher SHGC reading. This can help to reduce your winter heating costs.
However, during summer, windows with a higher SHGC reading need to have proper shade outside, otherwise they’ll increase your air-conditioning cooling costs.
Low ‘E’ glazing
When you purchase window glazing, if you want to retain heat in your premises, ask for low ‘E’ glass. The ‘E’ stands for ‘thermal emissivity’ and a low ‘E’ glass has improved insulating properties that result in less heat loss. This is particularly useful in colder climate zones. Low ‘E’ Glazing can also be incorporated into Double Glazing to achieve even higher performance.