In my house the nature of the construction causes the rigid vent pipe for the dryer vent to be about 22 to 23 feet long including the vertical rise in the wall behind the dryer. The 4 inch diameter vent runs horizontally for most of the distance between joists in the garage ceiling before exiting through the back wall in the garage attic space. Due to the routing there end up being a total of 8 turns in the vent pipe as can be seen at the indicated elbow locations in the layout diagram below.
As you can imagine cleaning this vent pipe is a total pain that takes a good half of a day which involves taking joints apart and having to crawl into the tight space under the garage rafters. Regular cleaning is necessary because the the long run with many turns causes dryer lint to accumulate in the pipe.
Would it be an advantage to install some type of inline booster fan unit to increase the flow rate in the pipe?
It seems like this could blow out more of the airborn lint coming from the dryer and also help the vent line dry out after the cloths dryer is used.