Kitchen Bathroom ventilation duct check valve should be set up on each floor?

Can be used separately. That is: either make holes in the walls of the kitchen room so that the pipes between the kitchens lead directly to the outside; Either make holes in the walls of the bathroom and open the ventilation ducts of the bathroom to the outside.

Ventilation ducts cannot be removed without permission, although they are indoors, but they are the common part of the building. There are also clear provisions in the relevant building decoration regulations of the state, which is a prohibited renovation behavior.

Generally, a building is unified with a pipe passage roof, or a vent is directly opened in the wall and directly discharged outside.

Dear, it is necessary to build the wall first, and install the ventilation duct after it is done.

Not required.

However, if you are on a lower floor, such as a floor, then it is recommended to install it. >>>More