Windows and doors
Choosing windows - which window frame? wood v aluminum v vinyl
...solar heat gain.
Solar Heat Gain Coefficient (SHGC):
The Solar Heat Gain Coefficient is a scale from 0 to 100 that indicates the amount of solar gain you will get through a pane of glass. The higher the number, the better the solar gain.
Energy Rating (ER):
After U-value, SHGC and the various designs and materials list...