Control Principle: For the high inertia for changing of the supply temperature and for the auto-controlled behaviour within certain limits, a usual control strategy does not make sense.

• 这种方法显示了自我调节的特征：在冬季，室内温度保持在20摄氏度，太阳出来后温度上升，这样，室内温度与水管中水的温度差别越来越小，直到室内温度达到26摄氏度，温度差为零。