Well I have a large 2 story building. Both floors has a dryer that vents to the roof. The vent booster always gets clogged with lint. So we disconnected the first floor dryer and just attached the 2nd floor dryer to vent to the roof. We installed an indoor vent for the first floor but didn’t know that gas dryers creates carbon monoxide and it is not recommended to use this. So pretty much I’m trying to see how can I connect the first floor dryer to vent all the way to the roof along with the 2nd floor and also to have an external lint catcher . I thought of a bucket type system but I don’t know if it will create enough pressure to go up. Any suggestions would be much appreciated.