Think it's okay to leave the windows open?
Published on:
2020-03-06
In our working life, the new air system has not been completely popular, most people think that when the indoor air is bad, open the window ventilation can be, why must install a new air system or ventilator? Why do people want to install a new air system worthwhile, it really has the manufacturer propaganda is so amazing? Next from the following points to solve the doubts in everyone's mind