i am remodeling a master bathroom that does not currently have a vent. The bathroom is on the second floor I intend to vent the bathroom up through the roof. My house has three floors. The laundry room is on the third floor directly above the bathroom. I will run the vent system through the laundry room up tho the roof. The third floor has an eleven foot ceiling. What type of vent/exhaust wywtem should I use. Also, I know that this probably isn't a good idea but can i safely attach the dryer vent(gas dryer) to the vathroom vent.