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Anonymous users2024-01-24If there is a check valve, if not, the exhaust fan in the ventilation pipe will be reversed, and the check valve should be guaranteed to open and close normally, on the other hand, it is not clear, you can consult, static electromechanical technology, we will provide you with a selection plan and reference opinions.
The duct type is through the air duct tuyere, and the integrated ceiling type is directly ventilated.
<> strong row stimulates the skin Xingming ventilation fan, and the fresh and empty sail is a good top.
Yes, but you have to pay for it because you need to put an extra keel where you install a ventilation fan. And you have to make more holes in the wall.
Integrated ceiling is a general term, but it does not include ventilation fans.
Yes, but the normal ones are now equipped with ventilation type, which is directly integrated into the ceiling, which is good-looking and usable >>>More