The direction your windows are facing is one of the things to consider when choosing which style of window awning will protect your home from the sun and save you the most on energy cost.
South Facing Windows –Solar heat gain can be reduced by 65% on south facing windows. It is easy to protect south-facing windows with an awning without sides for all sunlight but the lowest winter sun. In hot climates, however, it might be best to make the awning wide enough or install awnings with sides to block the midday winter sun year round.
North Facing Windows– North-facing windows can be protected with awnings without sides too, since the only time the sun impinges on them is early in the morning or late in the afternoon in summer.
East & West Facing Windows– Solar Heat gain and glare from direct sun entry can be reduced as much as 77% by adding window awnings with sides to east and west facing windows on your home. In the middle of the morning and afternoon the sun can be low enough in the skies that in can come underneath of the awning if the awning does not have sides. Awnings with sides provide the best sun protection for east and west facing windows.