Most air space-heating systems also preheat domestic hot water through an air-to-liquid heat exchanger.
Most air space-heating systems also preheat domestic hot water through an air-to-liquid heat exchanger.
大部分空气空间—加热系统也会通过气水热交换器预加热家庭里的热水。
Most air space-heating systems also preheat domestic hot water through an air-to-liquid heat exchanger.
大部分空气空间—加热系统也会通过气水热交换器预加热家庭里的热水。