My bathroom does not have an exhaust duct, and I want to share it with the kitchen exhaust duct, is

Make a hole in the wall of the bathroom to expel the smell of the bathroom.

No, you cannot. Even if a check valve is installed on the exhaust pipe, it cannot completely prevent the exhaust hood from exhausting the fume, as long as there is a little gap, the fume can enter the bathroom. Unless you turn on the exhaust fan in the bathroom while using the range hood, there will definitely be a smell of oil smoke in the bathroom.

There are lessons to be learned in this regard.

It is recommended to seek to make a hole in the wall of the bathroom to expel the smell of the bathroom.

Yes, but you need to install a check valve in the bathroom and kitchen airway to block the smell of the kitchen from flowing into the bathroom, and you also need to install a louver on the kitchen air outlet to prevent the water vapor from flowing into the kitchen! The key is the setting and measures on both mouths.

Try not to do this, the fumes are discharged back into the bathroom. If you must install it, you can install a damper at the air outlet in the bathroom (it is bought in the decoration market, called the flue check valve).

Yes, but you need to press an extractor fan outside the exhaust flue, otherwise the smell of the toilet will run to the kitchen.

It is not feasible to follow the norm, because the smell of the toilet will wear into the kitchen.

No. To be strung together.

The bathroom is taken over and outside.