This paper analyzes a series problems existing in original solar water heating system of urban residential buildings, and puts forward the transformation measures and transformation principles of solar water heating system by combining with the characteristics of various solar water heating systems, with a view to guide practice.%针对当前城市住宅建筑中原有太阳能热水系统存在的一系列问题进行了分析，结合不同形式太阳能热水系统的特点，提出了建筑太阳能热水系统改造措施和改造原则，以指导实践。
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