The 17th China Environmental Protection Exhibition Guangzhou station has come to a perfect end. In these two days of the exhibition, the harvest is full, our company showed the best products and the most cutting-edge technology, has been unanimously praised. Here, Dongtong thanks all kinds of elites to visit our booth!

Fans have a long history. More than 2,000 years ago, China, Babylon, Persia and other countries have used ancient windmills to lift water for irrigation and grinding grain. After the 12th century, windmills developed rapidly in Europe. As early as BC, China had already made a simple wooden rice huller, whose function principle was basically the same as that of modern centrifugal fans.

When the sun is shining so that you can't bear the heat, I will give you a cool, despite the high temperature and heat I am still busy, I will stick to the post for your peace of mind, in case of emergency let you worry, I am willing to solve your problems in time. Dongtong people, struggle in this hot sun, everything, only for your satisfied smile......

Although there is no strong data to prove whether the ventilation system can really eliminate indoor harmful gases and pollution, we also have to admit the advantages of ventilation systems.

Building energy conservation must not damage the air quality, for energy conservation appropriate limit ventilation is OK, but excessive reduction of ventilation will make indoor air quality decline, affecting the comfort of people's lives.