Actually very little power is lost in all the pipe if the system is installed correctly. There is a 2% loss of airflow in every 75' from the unit (including the hose), and the average sysem has a run of about 159-200' at the most. When you consider that a good central vac unit starts with around 150 CFM which is about the highest for a portable vacuum. The sharpest bend in a central should be right at the back of the inlet, if not, the system was installed badly, so anything that would stick in a bend will stick right at the inlet. Also, the system really only clogs if the unit is underpowered, I have picked up Kleenex, paper towels, rocks, and even plastic grocery bags with mine. And if there is any loss of the suction, the pipe was instaled incorrectly, causing a air leak. So, considering that my central vac unit is rated at 248 CFM and 136 IOW (inches of water lift), I would get about 244 CFM and 136 IOW at the end of the vacuum hose.