当一个系统用于采暖、制冷或水分配，则必须进行适当的调节和平衡以实现最佳的设计性能。一个没有平衡的系统可能导致房间之间产生高达7.8oC的温差和波动，从而导致高达35%的能量损耗。
Whether a system is designed for heating, cooling
or water distribution it must be properly adjusted and balanced for optimum
design performance. An unbalanced systems may produce temperature variations
of up to 14oF between rooms, which can typically add up to
35% to energy costs.
如果系统安装适当的预置装置，并且精确计算了压降，则可能会节省宝贵的时间和金钱。
Valuable time and money can be saved when the
system being installed matches a pre-determined design and accurate pressure-drop
calculations have already been made.
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