_ Suntempering:
           a limited use of solar techniques; modestly increasing south-facing window area, usually by relocating windows from other             sides of the house. but without adding thermal mass.  
North windows should be used with care. Sometimes views or the diffuse northern light are desirable, but in general north-facing windows should not be large. Very large north -facing windows should have high insulation value, or R-value. Since north windows receive relatively little direct sun in summer, they do not present much of a shading problem. So if the choice were between an average-sized north-facing window and an east or west facing window. north would actually be a better choice, considering both summer and winter performance.
East windows catch the morning sun. Not enough to provide significant energy, but, unfortunately, usually enough to cause potential overheating problems in summer. If the views or other elements in the house's design dictate east windows, shading should be done with particular care.
West windows may be the most problematic, and there are few shading systems that will be effective enough to offset the potential for overheating from a large west-facing window. Glass with a low shading coefficient may be one effective approach for example, tinted glass or some types of low-e glass which provide some shading while allowing almost clear views. The cost of properly shading both east and west windows should be balanced against the benefits. As many windows as possible should be kept operable for easy natural ventilation in summer.