With the change of environmental temperature, the air sourced heat pump water heater will frost in winter and the low pressure will be too high in summer.

随着环境的变化，热泵热水机将出现冬季结霜，夏季出现低压压力过高的现象。

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The tribe has money for more housing, but can't build because the water pressure is too low and its treatment systems too outdated to handle increased demand.

CNN: King: Life is bare bones on the Lakota reservation