What should I do if the bathroom bomb is not connected to the exhaust pipe and there is a hole expos

Yes, but it is best to install a check valve in case the wind is blown back into the bath bomb exhaust pipe and back indoors when the bathroom exhaust pipe is only opened.

This should be the glue at the drainage pipe of the upper bathroom for a long time, and there is also the waterproofing of the upper bathroom is not well treated, and the leakage of the ventilation pipe mouth and the bath bomb exhaust pipe connection caused by downward leakage around the drainage pipe.

It is best to install it, otherwise the wind is discharged on the top, so the master can reinstall it and cover the light line.

It is necessary to drill the hole to connect the fan pipe, because the use of the bath bomb for a long time, overheating, the fan will automatically turn on to dissipate heat, otherwise, overheating is easy to be dangerous.

There are a total of 5 bath bomb light lines, and a zero line is pulled in the ceiling to connect directly to the zero line of the bath bomb. The remaining 4 are led to the switch, and the switch leads to a live wire, which is connected to the common end of the 4 switches, and the other end of the 4 switches is connected to the lamp heating 1, lamp heating 2, ventilation and lighting controlled by each other.