Buy Nutone Central Vacuum Cleaner bags from Acevacuums.com and save big. A central vacuum cleaner is a type of vacuum cleaner appliance, installed into a building as a semi-permanent fixture. Central vacuum systems are designed to remove dirt and debris from homes and buildings, sending dirt particles through tubing installed inside the walls to a collection container in a remote utility space. Central vacuum systems require periodic emptying of the dirt canister or replacing the filter bag, typically 6–8 times a year. In some models, it is also important that the NuTone filters be changed frequently, especially for designs where the just-filtered air passes through the motor for cooling. For filtered systems, the NuTone  bag may need to be replaced long before it is filled to its nominal capacity, because of reduced suction due to clogging with dirt or fine dust.