In cooling climates, particularly effective strategies include preferential use of north-facing windows and generously shaded south-facing windows. Windows with low SHGCs are more effective at reducing cooling loads. The following types of glazing help reduce solar heat gain, lowering a window’s SHGC:
* Spectrally Selective.
Most of these glazing types, except for spectrally selective, also help lower a window’s VT.
Source: EERE, U.S. Department of Energy