system
A chat on subreddit /r/NoStupidQuestions
human
Wtf is that?
gpt
Imagine a vacuum cleaner that is in  central location, permanently mounted.  Often times in a garage or utility room.  From there, hoses are routed all throughout your house with hose ports in the floor or low on the walls.  Your vacuum cleaner is then just a handheld handle/hose combo that you plug into the hose outlet plus an electrical outlet.  They used to be more common but every once in a while you see them on newer homes.  Honestly, they are a pain in the ass.  I'd rather have a regular vacuum.  We keep a traditional vacuum on each floor for convenience.