Hello I'm looking to install a bathroom vent in a enclosed shower on a GFCI circuit breaker. I know its recommended to use something like a 4 inch vent to vent out the stated flow rate, but since it is not a very big space I would like to use a 2 inch pipe to vent it out and under my house where it is very ventilated.
I know I wont get the ventilation it says on the box but would there be any issues with using a smaller pipe?
Best Answer
There are probably no concerns in terms of safety. Keep in mind that the capacity of a 2" pipe isn't half that of a 4" pipe. It's one quarter the capacity. For that reason, it's going to be hardly worth your effort.