With automatic constant temperature, it is applicable to kinds of radiator heat collecting of hot water heating system and can create comfortable and healthy indoor environment.
应用于各种热水采暖散热器采暖，能自动恒温，创造舒适、健康的室内环境。
A fresh air system with a preheat function can provide comfortable temperature of fresh air to keep the indoor temperature at the same time to achieve energy-saving purposes.
具有预热功能的新风系统，把温度适宜的新风引入，保持室内温度的同时又达到节能的目的。
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