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Recent advances in building materials and techniques have convinced designers of cost-effective zero energy homes to reduce emphasis on full passive solar design in favor of “solar tempering.” There are many reasons for this shift among them are variable climate factors, the higher cost of low U-value/high SHGC windows, the benefits of having fewer windows, the high cost of thermal mass, and the risks of overheating if passive solar is not properly implemented. Solar tempering provides a cost-effective alternative that involves taking advantage of solar heat gain without increasing window area or cost. It works best when the common living areas and most windows face south. Optimal shading lets in winter warmth and excludes summer heat. Solar tempering provides added light and warmth to the living areas and may reduce heating costs by 10% to 20% without added expense and without risk of overheating in summer